51997755026 has 24 divisors (see below), whose sum is σ = 90947389680. Its totient is φ = 22231549032.

The previous prime is 51997754999. The next prime is 51997755127. The reversal of 51997755026 is 62055779915.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 592100 + ... + 674223.

It is an arithmetic number, because the mean of its divisors is an integer number (3789474570).

Almost surely, 2^51997755026 is an apocalyptic number.

51997755026 is a deficient number, since it is larger than the sum of its proper divisors (38949634654).

51997755026 is a wasteful number, since it uses less digits than its factorization.

51997755026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266758 (or 1266751 counting only the distinct ones).

The product of its (nonzero) digits is 5953500, while the sum is 56.

The spelling of 51997755026 in words is "fifty-one billion, nine hundred ninety-seven million, seven hundred fifty-five thousand, twenty-six".