25457517738 has 48 divisors (see below), whose sum is σ = 55319621760. Its totient is φ = 8461012032.

The previous prime is 25457517713. The next prime is 25457517739. The reversal of 25457517738 is 83771575452.

25457517738 is a `hidden beast` number, since 2 + 5 + 4 + 57 + 517 + 73 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (25457517739) 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 23 ways as a sum of consecutive naturals, for example, 12772470 + ... + 12774462.

It is an arithmetic number, because the mean of its divisors is an integer number (1152492120).

Almost surely, 2^25457517738 is an apocalyptic number.

25457517738 is an abundant number, since it is smaller than the sum of its proper divisors (29862104022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25457517738 is a wasteful number, since it uses less digits than its factorization.

25457517738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3723 (or 3720 counting only the distinct ones).

The product of its digits is 8232000, while the sum is 54.

The spelling of 25457517738 in words is "twenty-five billion, four hundred fifty-seven million, five hundred seventeen thousand, seven hundred thirty-eight".