55661611504 has 40 divisors (see below), whose sum is σ = 108068976000. Its totient is φ = 27772920000.

The previous prime is 55661611501. The next prime is 55661611547. The reversal of 55661611504 is 40511616655.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55661611501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24726379 + ... + 24728629.

It is an arithmetic number, because the mean of its divisors is an integer number (2701724400).

Almost surely, 2^55661611504 is an apocalyptic number.

It is an amenable number.

55661611504 is a deficient number, since it is larger than the sum of its proper divisors (52407364496).

55661611504 is a wasteful number, since it uses less digits than its factorization.

55661611504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4789 (or 4783 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 55661611504 in words is "fifty-five billion, six hundred sixty-one million, six hundred eleven thousand, five hundred four".