55000919661 has 16 divisors (see below), whose sum is σ = 74557756800. Its totient is φ = 36060555200.

The previous prime is 55000919657. The next prime is 55000919663. The reversal of 55000919661 is 16691900055.

It is not a de Polignac number, because 55000919661 - 2² = 55000919657 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55000919663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 563985 + ... + 654278.

It is an arithmetic number, because the mean of its divisors is an integer number (4659859800).

Almost surely, 2^55000919661 is an apocalyptic number.

It is an amenable number.

55000919661 is a deficient number, since it is larger than the sum of its proper divisors (19556837139).

55000919661 is a wasteful number, since it uses less digits than its factorization.

55000919661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218516.

The product of its (nonzero) digits is 72900, while the sum is 42.

The spelling of 55000919661 in words is "fifty-five billion, nine hundred nineteen thousand, six hundred sixty-one".