25511513313 has 192 divisors, whose sum is σ = 45045504000. Its totient is φ = 12695823360.

The previous prime is 25511513309. The next prime is 25511513317. The reversal of 25511513313 is 31331511552.

It is an interprime number because it is at equal distance from previous prime (25511513309) and next prime (25511513317).

It is not a de Polignac number, because 25511513313 - 2² = 25511513309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25511513317) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 183535998 + ... + 183536136.

It is an arithmetic number, because the mean of its divisors is an integer number (234612000).

Almost surely, 2^25511513313 is an apocalyptic number.

25511513313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25511513313 is a deficient number, since it is larger than the sum of its proper divisors (19533990687).

25511513313 is a wasteful number, since it uses less digits than its factorization.

25511513313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 297 counting only the distinct ones).

The product of its digits is 6750, while the sum is 30.

The spelling of 25511513313 in words is "twenty-five billion, five hundred eleven million, five hundred thirteen thousand, three hundred thirteen".