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51978530048 = 28203041133
BaseRepresentation
bin110000011010001010…
…010110110100000000
311222011110202220121112
4300122022112310000
51322423000430143
635513440142452
73520035133634
oct603212266400
9158143686545
1051978530048
1120053585a55
12a0a7607a28
134b9493a873
1427313dadc4
151543415e18
hexc1a296d00

51978530048 has 18 divisors (see below), whose sum is σ = 103754019474. Its totient is φ = 25989264896.

The previous prime is 51978530041. The next prime is 51978530053. The reversal of 51978530048 is 84003587915.

It can be written as a sum of positive squares in only one way, i.e., 51932940544 + 45589504 = 227888^2 + 6752^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51978529978 and 51978530005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51978530041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101520311 + ... + 101520822.

It is an arithmetic number, because the mean of its divisors is an integer number (5764112193).

Almost surely, 251978530048 is an apocalyptic number.

It is an amenable number.

51978530048 is a deficient number, since it is larger than the sum of its proper divisors (51775489426).

51978530048 is an equidigital number, since it uses as much as digits as its factorization.

51978530048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203041149 (or 203041135 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 51978530048 in words is "fifty-one billion, nine hundred seventy-eight million, five hundred thirty thousand, forty-eight".

Divisors: 1 2 4 8 16 32 64 128 256 203041133 406082266 812164532 1624329064 3248658128 6497316256 12994632512 25989265024 51978530048