55972044309646 has 4 divisors (see below), whose sum is σ = 83958066464472. Its totient is φ = 27986022154822.

The previous prime is 55972044309583. The next prime is 55972044309691. The reversal of 55972044309646 is 64690344027955.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13993011077410 + ... + 13993011077413.

It is an arithmetic number, because the mean of its divisors is an integer number (20989516616118).

Almost surely, 2^{55972044309646} is an apocalyptic number.

55972044309646 is a deficient number, since it is larger than the sum of its proper divisors (27986022154826).

55972044309646 is a wasteful number, since it uses less digits than its factorization.

55972044309646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27986022154825.

The product of its (nonzero) digits is 195955200, while the sum is 64.

The spelling of 55972044309646 in words is "fifty-five trillion, nine hundred seventy-two billion, forty-four million, three hundred nine thousand, six hundred forty-six".