25502257051 has 16 divisors (see below), whose sum is σ = 26034259680. Its totient is φ = 24975820800.

The previous prime is 25502257013. The next prime is 25502257061. The reversal of 25502257051 is 15075220552.

It is a cyclic number.

It is not a de Polignac number, because 25502257051 - 2⁹ = 25502256539 is a prime.

It is a super-2 number, since 2×25502257051² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25502256998 and 25502257016.

It is not an unprimeable number, because it can be changed into a prime (25502257061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6818740 + ... + 6822478.

It is an arithmetic number, because the mean of its divisors is an integer number (1627141230).

Almost surely, 2^25502257051 is an apocalyptic number.

25502257051 is a deficient number, since it is larger than the sum of its proper divisors (532002629).

25502257051 is a wasteful number, since it uses less digits than its factorization.

25502257051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4446.

The product of its (nonzero) digits is 35000, while the sum is 34.

The spelling of 25502257051 in words is "twenty-five billion, five hundred two million, two hundred fifty-seven thousand, fifty-one".