51902698791 has 64 divisors (see below), whose sum is σ = 75872076800. Its totient is φ = 31446890496.

The previous prime is 51902698789. The next prime is 51902698811. The reversal of 51902698791 is 19789620915.

It is not a de Polignac number, because 51902698791 - 2¹ = 51902698789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51902698711) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 73205145 + ... + 73205853.

It is an arithmetic number, because the mean of its divisors is an integer number (1185501200).

Almost surely, 2^51902698791 is an apocalyptic number.

51902698791 is a deficient number, since it is larger than the sum of its proper divisors (23969378009).

51902698791 is a wasteful number, since it uses less digits than its factorization.

51902698791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208.

The product of its (nonzero) digits is 2449440, while the sum is 57.

The spelling of 51902698791 in words is "fifty-one billion, nine hundred two million, six hundred ninety-eight thousand, seven hundred ninety-one".