55918839930 has 32 divisors (see below), whose sum is σ = 140040226944. Its totient is φ = 14263356096.

The previous prime is 55918839923. The next prime is 55918839931. The reversal of 55918839930 is 3993881955.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55918839931) 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, 40520209 + ... + 40521588.

It is an arithmetic number, because the mean of its divisors is an integer number (4376257092).

Almost surely, 2^55918839930 is an apocalyptic number.

55918839930 is an abundant number, since it is smaller than the sum of its proper divisors (84121387014).

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

55918839930 is a wasteful number, since it uses less digits than its factorization.

55918839930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81041830.

The product of its (nonzero) digits is 10497600, while the sum is 60.

The spelling of 55918839930 in words is "fifty-five billion, nine hundred eighteen million, eight hundred thirty-nine thousand, nine hundred thirty".