25393971216 has 40 divisors (see below), whose sum is σ = 65887588480. Its totient is φ = 8427689856.

The previous prime is 25393971209. The next prime is 25393971259. The reversal of 25393971216 is 61217939352.

It is a super-6 number, since 6×25393971216⁶ (a number of 64 digits) contains 666666 as substring. Note that it is a super-d number also for d = 3.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1144120 + ... + 1166103.

It is an arithmetic number, because the mean of its divisors is an integer number (1647189712).

Almost surely, 2^25393971216 is an apocalyptic number.

It is an amenable number.

25393971216 is an abundant number, since it is smaller than the sum of its proper divisors (40493617264).

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

25393971216 is a wasteful number, since it uses less digits than its factorization.

25393971216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310463 (or 2310457 counting only the distinct ones).

The product of its digits is 612360, while the sum is 48.

The spelling of 25393971216 in words is "twenty-five billion, three hundred ninety-three million, nine hundred seventy-one thousand, two hundred sixteen".