55688071940 has 24 divisors (see below), whose sum is σ = 117258492120. Its totient is φ = 22215506688.

The previous prime is 55688071939. The next prime is 55688071961. The reversal of 55688071940 is 4917088655.

It can be written as a sum of positive squares in 4 ways, for example, as 5048670916 + 50639401024 = 71054^2 + 225032^2 .

It is a super-2 number, since 2×55688071940² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3724985 + ... + 3739904.

It is an arithmetic number, because the mean of its divisors is an integer number (4885770505).

Almost surely, 2^55688071940 is an apocalyptic number.

It is an amenable number.

55688071940 is an abundant number, since it is smaller than the sum of its proper divisors (61570420180).

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

55688071940 is a wasteful number, since it uses less digits than its factorization.

55688071940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7465271 (or 7465269 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 55688071940 in words is "fifty-five billion, six hundred eighty-eight million, seventy-one thousand, nine hundred forty".