51508370057 has 8 divisors (see below), whose sum is σ = 54543117096. Its totient is φ = 48474161152.

The previous prime is 51508369973. The next prime is 51508370063. The reversal of 51508370057 is 75007380515.

It can be written as a sum of positive squares in 4 ways, for example, as 7213274761 + 44295095296 = 84931^2 + 210464^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51508370057 is a prime.

It is a super-2 number, since 2×51508370057² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51508369996 and 51508370023.

It is not an unprimeable number, because it can be changed into a prime (51508375057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71573 + ... + 328845.

It is an arithmetic number, because the mean of its divisors is an integer number (6817889637).

Almost surely, 2^51508370057 is an apocalyptic number.

It is an amenable number.

51508370057 is a deficient number, since it is larger than the sum of its proper divisors (3034747039).

51508370057 is a wasteful number, since it uses less digits than its factorization.

51508370057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269067.

The product of its (nonzero) digits is 147000, while the sum is 41.

The spelling of 51508370057 in words is "fifty-one billion, five hundred eight million, three hundred seventy thousand, fifty-seven".