12557015745 has 32 divisors (see below), whose sum is σ = 21290024448. Its totient is φ = 6298103808.

The previous prime is 12557015743. The next prime is 12557015749. The reversal of 12557015745 is 54751075521.

It is not a de Polignac number, because 12557015745 - 2¹ = 12557015743 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12557015697 and 12557015706.

It is not an unprimeable number, because it can be changed into a prime (12557015743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 311752 + ... + 349718.

It is an arithmetic number, because the mean of its divisors is an integer number (665313264).

Almost surely, 2^12557015745 is an apocalyptic number.

12557015745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12557015745 is a deficient number, since it is larger than the sum of its proper divisors (8733008703).

12557015745 is a wasteful number, since it uses less digits than its factorization.

12557015745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39289.

The product of its (nonzero) digits is 245000, while the sum is 42.

The spelling of 12557015745 in words is "twelve billion, five hundred fifty-seven million, fifteen thousand, seven hundred forty-five".