12001557007 has 16 divisors (see below), whose sum is σ = 13176483840. Its totient is φ = 10840746400.

The previous prime is 12001556971. The next prime is 12001557041. The reversal of 12001557007 is 70075510021.

It is a de Polignac number, because none of the positive numbers 2^k-12001557007 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 (12001557047) 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, 2125494 + ... + 2131132.

It is an arithmetic number, because the mean of its divisors is an integer number (823530240).

Almost surely, 2^12001557007 is an apocalyptic number.

12001557007 is a deficient number, since it is larger than the sum of its proper divisors (1174926833).

12001557007 is a wasteful number, since it uses less digits than its factorization.

12001557007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6854.

The product of its (nonzero) digits is 2450, while the sum is 28.

The spelling of 12001557007 in words is "twelve billion, one million, five hundred fifty-seven thousand, seven".