12811605475 has 24 divisors (see below), whose sum is σ = 17449597440. Its totient is φ = 9287673120.

The previous prime is 12811605451. The next prime is 12811605491. The reversal of 12811605475 is 57450611821.

It is not a de Polignac number, because 12811605475 - 2⁹ = 12811604963 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 575419 + ... + 597268.

It is an arithmetic number, because the mean of its divisors is an integer number (727066560).

Almost surely, 2^12811605475 is an apocalyptic number.

12811605475 is a deficient number, since it is larger than the sum of its proper divisors (4637991965).

12811605475 is a wasteful number, since it uses less digits than its factorization.

12811605475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172739 (or 1172734 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 12811605475 in words is "twelve billion, eight hundred eleven million, six hundred five thousand, four hundred seventy-five".