11515820425 has 12 divisors (see below), whose sum is σ = 14294174400. Its totient is φ = 9203264720.

The previous prime is 11515820419. The next prime is 11515820501. The reversal of 11515820425 is 52402851511.

It is not a de Polignac number, because 11515820425 - 2¹³ = 11515812233 is a prime.

It is a super-2 number, since 2×11515820425² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209725 + ... + 258874.

It is an arithmetic number, because the mean of its divisors is an integer number (1191181200).

Almost surely, 2^11515820425 is an apocalyptic number.

It is an amenable number.

11515820425 is a deficient number, since it is larger than the sum of its proper divisors (2778353975).

11515820425 is an equidigital number, since it uses as much as digits as its factorization.

11515820425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469592 (or 469587 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 34.

The spelling of 11515820425 in words is "eleven billion, five hundred fifteen million, eight hundred twenty thousand, four hundred twenty-five".