11937983221564 has 12 divisors (see below), whose sum is σ = 21335970013344. Its totient is φ = 5841991789184.

The previous prime is 11937983221559. The next prime is 11937983221607. The reversal of 11937983221564 is 46512238973911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31749955189 + ... + 31749955564.

It is an arithmetic number, because the mean of its divisors is an integer number (1777997501112).

Almost surely, 2^{11937983221564} is an apocalyptic number.

It is an amenable number.

11937983221564 is a deficient number, since it is larger than the sum of its proper divisors (9397986791780).

11937983221564 is a wasteful number, since it uses less digits than its factorization.

11937983221564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63499910804 (or 63499910802 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 61.

The spelling of 11937983221564 in words is "eleven trillion, nine hundred thirty-seven billion, nine hundred eighty-three million, two hundred twenty-one thousand, five hundred sixty-four".