55147156993912 has 64 divisors (see below), whose sum is σ = 110705490288000. Its totient is φ = 25675498341504.

The previous prime is 55147156993813. The next prime is 55147156993927. The reversal of 55147156993912 is 21939965174155.

It is a super-2 number, since 2×55147156993912² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56218398 + ... + 57190930.

It is an arithmetic number, because the mean of its divisors is an integer number (1729773285750).

Almost surely, 2^{55147156993912} is an apocalyptic number.

It is an amenable number.

55147156993912 is an abundant number, since it is smaller than the sum of its proper divisors (55558333294088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55147156993912 is a wasteful number, since it uses less digits than its factorization.

55147156993912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978940 (or 978936 counting only the distinct ones).

The product of its digits is 91854000, while the sum is 67.

The spelling of 55147156993912 in words is "fifty-five trillion, one hundred forty-seven billion, one hundred fifty-six million, nine hundred ninety-three thousand, nine hundred twelve".