51073740025 has 81 divisors (see below), whose sum is σ = 81115691727. Its totient is φ = 31783936800.

The previous prime is 51073740019. The next prime is 51073740043. The reversal of 51073740025 is 52004737015.

The square root of 51073740025 is 225995.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 18386546409 + 32687193616 = 135597^2 + 180796^2 .

It is not a de Polignac number, because 51073740025 - 2³ = 51073740017 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 87007782 + ... + 87008368.

Almost surely, 2^51073740025 is an apocalyptic number.

51073740025 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51073740025 is the 225995-th square number.

51073740025 is the 112998-th centered octagonal number.

It is an amenable number.

51073740025 is a deficient number, since it is larger than the sum of its proper divisors (30041951702).

51073740025 is an equidigital number, since it uses as much as digits as its factorization.

51073740025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 34.

The spelling of 51073740025 in words is "fifty-one billion, seventy-three million, seven hundred forty thousand, twenty-five".