55581651408 has 20 divisors (see below), whose sum is σ = 143585932928. Its totient is φ = 18527217120.

The previous prime is 55581651361. The next prime is 55581651413. The reversal of 55581651408 is 80415618555.

55581651408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 1157951071 = 55581651408 / (5 + 5 + 5 + 8 + 1 + 6 + 5 + 1 + 4 + 0 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578975488 + ... + 578975583.

Almost surely, 2^55581651408 is an apocalyptic number.

It is an amenable number.

55581651408 is an abundant number, since it is smaller than the sum of its proper divisors (88004281520).

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

55581651408 is a wasteful number, since it uses less digits than its factorization.

55581651408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157951082 (or 1157951076 counting only the distinct ones).

The product of its (nonzero) digits is 960000, while the sum is 48.

The spelling of 55581651408 in words is "fifty-five billion, five hundred eighty-one million, six hundred fifty-one thousand, four hundred eight".