51297440025 has 48 divisors (see below), whose sum is σ = 91361027520. Its totient is φ = 25247136000.

The previous prime is 51297439913. The next prime is 51297440027. The reversal of 51297440025 is 52004479215.

It is not a de Polignac number, because 51297440025 - 2¹⁹ = 51296915737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (51297440027) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 6488575 + ... + 6496475.

It is an arithmetic number, because the mean of its divisors is an integer number (1903354740).

Almost surely, 2^51297440025 is an apocalyptic number.

It is an amenable number.

51297440025 is a deficient number, since it is larger than the sum of its proper divisors (40063587495).

51297440025 is a wasteful number, since it uses less digits than its factorization.

51297440025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14586 (or 14581 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 51297440025 in words is "fifty-one billion, two hundred ninety-seven million, four hundred forty thousand, twenty-five".