55398390944 has 24 divisors (see below), whose sum is σ = 117455243220. Its totient is φ = 25568487936.

The previous prime is 55398390937. The next prime is 55398390979. The reversal of 55398390944 is 44909389355.

It can be written as a sum of positive squares in 2 ways, for example, as 48053900944 + 7344490000 = 219212^2 + 85700^2 .

It is a super-2 number, since 2×55398390944² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66584189 + ... + 66585020.

Almost surely, 2^55398390944 is an apocalyptic number.

It is an amenable number.

55398390944 is an abundant number, since it is smaller than the sum of its proper divisors (62056852276).

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

55398390944 is a wasteful number, since it uses less digits than its factorization.

55398390944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133169232 (or 133169224 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 59.

The spelling of 55398390944 in words is "fifty-five billion, three hundred ninety-eight million, three hundred ninety thousand, nine hundred forty-four".