51637011492 has 48 divisors (see below), whose sum is σ = 133290952704. Its totient is φ = 15427188000.

The previous prime is 51637011473. The next prime is 51637011499. The reversal of 51637011492 is 29411073615.

It is a self number, because there is not a number n which added to its sum of digits gives 51637011492.

It is not an unprimeable number, because it can be changed into a prime (51637011499) 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 in 15 ways as a sum of consecutive naturals, for example, 2745484 + ... + 2764227.

It is an arithmetic number, because the mean of its divisors is an integer number (2776894848).

Almost surely, 2^51637011492 is an apocalyptic number.

It is an amenable number.

51637011492 is an abundant number, since it is smaller than the sum of its proper divisors (81653941212).

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

51637011492 is a wasteful number, since it uses less digits than its factorization.

51637011492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5509800 (or 5509798 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 51637011492 in words is "fifty-one billion, six hundred thirty-seven million, eleven thousand, four hundred ninety-two".