55671926640 has 160 divisors (see below), whose sum is σ = 188725420800. Its totient is φ = 13463746560.

The previous prime is 55671926599. The next prime is 55671926669. The reversal of 55671926640 is 4662917655.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1080996 + ... + 1131324.

It is an arithmetic number, because the mean of its divisors is an integer number (1179533880).

Almost surely, 2^55671926640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55671926640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94362710400).

55671926640 is an abundant number, since it is smaller than the sum of its proper divisors (133053494160).

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

55671926640 is a wasteful number, since it uses less digits than its factorization.

55671926640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50775 (or 50769 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 55671926640 in words is "fifty-five billion, six hundred seventy-one million, nine hundred twenty-six thousand, six hundred forty".