12057231557 has 16 divisors (see below), whose sum is σ = 14384666880. Its totient is φ = 9881405952.

The previous prime is 12057231541. The next prime is 12057231577. The reversal of 12057231557 is 75513275021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12057231557 - 2⁴ = 12057231541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12057231557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12057231577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419669 + ... + 447477.

It is an arithmetic number, because the mean of its divisors is an integer number (899041680).

Almost surely, 2^12057231557 is an apocalyptic number.

It is an amenable number.

12057231557 is a deficient number, since it is larger than the sum of its proper divisors (2327435323).

12057231557 is a wasteful number, since it uses less digits than its factorization.

12057231557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30532.

The product of its (nonzero) digits is 73500, while the sum is 38.

The spelling of 12057231557 in words is "twelve billion, fifty-seven million, two hundred thirty-one thousand, five hundred fifty-seven".