51539077950 has 96 divisors (see below), whose sum is σ = 134608467840. Its totient is φ = 13014172800.

The previous prime is 51539077943. The next prime is 51539077951. The reversal of 51539077950 is 5977093515.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51539077893 and 51539077902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51539077951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10089297 + ... + 10094403.

It is an arithmetic number, because the mean of its divisors is an integer number (1402171540).

Almost surely, 2^51539077950 is an apocalyptic number.

51539077950 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51539077950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67304233920).

51539077950 is an abundant number, since it is smaller than the sum of its proper divisors (83069389890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51539077950 is a wasteful number, since it uses less digits than its factorization.

51539077950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8682 (or 8677 counting only the distinct ones).

The product of its (nonzero) digits is 1488375, while the sum is 51.

The spelling of 51539077950 in words is "fifty-one billion, five hundred thirty-nine million, seventy-seven thousand, nine hundred fifty".