12015557461 has 8 divisors (see below), whose sum is σ = 12069763200. Its totient is φ = 11961384960.

The previous prime is 12015557453. The next prime is 12015557507. The reversal of 12015557461 is 16475551021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12015557461 - 2³ = 12015557453 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 12015557461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12015257461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971605 + ... + 983893.

It is an arithmetic number, because the mean of its divisors is an integer number (1508720400).

Almost surely, 2^12015557461 is an apocalyptic number.

It is an amenable number.

12015557461 is a deficient number, since it is larger than the sum of its proper divisors (54205739).

12015557461 is a wasteful number, since it uses less digits than its factorization.

12015557461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16619.

The product of its (nonzero) digits is 42000, while the sum is 37.

The spelling of 12015557461 in words is "twelve billion, fifteen million, five hundred fifty-seven thousand, four hundred sixty-one".