25261551412 has 6 divisors (see below), whose sum is σ = 44207714978. Its totient is φ = 12630775704.

The previous prime is 25261551379. The next prime is 25261551437. The reversal of 25261551412 is 21415516252.

It can be written as a sum of positive squares in only one way, i.e., 22106931856 + 3154619556 = 148684^2 + 56166^2 .

It is a super-2 number, since 2×25261551412² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3157693923 + ... + 3157693930.

Almost surely, 2^25261551412 is an apocalyptic number.

It is an amenable number.

25261551412 is a deficient number, since it is larger than the sum of its proper divisors (18946163566).

25261551412 is a wasteful number, since it uses less digits than its factorization.

25261551412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6315387857 (or 6315387855 counting only the distinct ones).

The product of its digits is 24000, while the sum is 34.

The spelling of 25261551412 in words is "twenty-five billion, two hundred sixty-one million, five hundred fifty-one thousand, four hundred twelve".