12516446554 has 16 divisors (see below), whose sum is σ = 19881194688. Its totient is φ = 5889460672.

The previous prime is 12516446539. The next prime is 12516446573. The reversal of 12516446554 is 45564461521.

It is a super-2 number, since 2×12516446554² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12516446554.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500619 + ... + 525025.

It is an arithmetic number, because the mean of its divisors is an integer number (1242574668).

Almost surely, 2^12516446554 is an apocalyptic number.

12516446554 is a deficient number, since it is larger than the sum of its proper divisors (7364748134).

12516446554 is a wasteful number, since it uses less digits than its factorization.

12516446554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39509.

The product of its digits is 576000, while the sum is 43.

The spelling of 12516446554 in words is "twelve billion, five hundred sixteen million, four hundred forty-six thousand, five hundred fifty-four".