12561057151 has 4 divisors (see below), whose sum is σ = 12605758704. Its totient is φ = 12516355600.

The previous prime is 12561057143. The next prime is 12561057193. The reversal of 12561057151 is 15175016521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12561057151 - 2³ = 12561057143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12561057251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22350355 + ... + 22350916.

It is an arithmetic number, because the mean of its divisors is an integer number (3151439676).

Almost surely, 2^12561057151 is an apocalyptic number.

12561057151 is a deficient number, since it is larger than the sum of its proper divisors (44701553).

12561057151 is an equidigital number, since it uses as much as digits as its factorization.

12561057151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44701552.

The product of its (nonzero) digits is 10500, while the sum is 34.

The spelling of 12561057151 in words is "twelve billion, five hundred sixty-one million, fifty-seven thousand, one hundred fifty-one".