5642631855 has 64 divisors (see below), whose sum is σ = 11510553600. Its totient is φ = 2569104000.

The previous prime is 5642631853. The next prime is 5642631887. The reversal of 5642631855 is 5581362465.

5642631855 is a `hidden beast` number, since 5 + 6 + 4 + 2 + 631 + 8 + 5 + 5 = 666.

It is not a de Polignac number, because 5642631855 - 2¹ = 5642631853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 5642631855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5642631853) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 225301 + ... + 249089.

It is an arithmetic number, because the mean of its divisors is an integer number (179852400).

Almost surely, 2^5642631855 is an apocalyptic number.

5642631855 is an abundant number, since it is smaller than the sum of its proper divisors (5867921745).

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

5642631855 is a wasteful number, since it uses less digits than its factorization.

5642631855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24061 (or 24055 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 5642631855 is about 75117.4537308075. The cubic root of 5642631855 is about 1780.3029252361.

The spelling of 5642631855 in words is "five billion, six hundred forty-two million, six hundred thirty-one thousand, eight hundred fifty-five".