25075521612 has 72 divisors (see below), whose sum is σ = 63662416272. Its totient is φ = 8322048000.

The previous prime is 25075521599. The next prime is 25075521617. The reversal of 25075521612 is 21612557052.

25075521612 is a `hidden beast` number, since 2 + 5 + 0 + 75 + 521 + 61 + 2 = 666.

It is a super-2 number, since 2×25075521612² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (25075521617) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 15661612 + ... + 15663212.

It is an arithmetic number, because the mean of its divisors is an integer number (884200226).

Almost surely, 2^25075521612 is an apocalyptic number.

It is an amenable number.

25075521612 is an abundant number, since it is smaller than the sum of its proper divisors (38586894660).

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

25075521612 is a wasteful number, since it uses less digits than its factorization.

25075521612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239 (or 3234 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The spelling of 25075521612 in words is "twenty-five billion, seventy-five million, five hundred twenty-one thousand, six hundred twelve".