25138852170 has 64 divisors (see below), whose sum is σ = 63901789056. Its totient is φ = 6307430400.

The previous prime is 25138852147. The next prime is 25138852223. The reversal of 25138852170 is 7125883152.

It is a super-2 number, since 2×25138852170² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 2443377 + ... + 2453643.

It is an arithmetic number, because the mean of its divisors is an integer number (998465454).

Almost surely, 2^25138852170 is an apocalyptic number.

25138852170 is an abundant number, since it is smaller than the sum of its proper divisors (38762936886).

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

25138852170 is a wasteful number, since it uses less digits than its factorization.

25138852170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15095.

The product of its (nonzero) digits is 134400, while the sum is 42.

The spelling of 25138852170 in words is "twenty-five billion, one hundred thirty-eight million, eight hundred fifty-two thousand, one hundred seventy".