51997755025 has 12 divisors (see below), whose sum is σ = 64513926400. Its totient is φ = 41574520080.

The previous prime is 51997754999. The next prime is 51997755127. The reversal of 51997755025 is 52055779915.

It is a happy number.

It is not a de Polignac number, because 51997755025 - 2⁹ = 51997754513 is a prime.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

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, 547245 + ... + 635194.

Almost surely, 2^51997755025 is an apocalyptic number.

It is an amenable number.

51997755025 is a deficient number, since it is larger than the sum of its proper divisors (12516171375).

51997755025 is a wasteful number, since it uses less digits than its factorization.

51997755025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184208 (or 1184203 counting only the distinct ones).

The product of its (nonzero) digits is 4961250, while the sum is 55.

The spelling of 51997755025 in words is "fifty-one billion, nine hundred ninety-seven million, seven hundred fifty-five thousand, twenty-five".