42255552690 has 80 divisors (see below), whose sum is σ = 122360554008. Its totient is φ = 10401364224.

The previous prime is 42255552679. The next prime is 42255552707. The reversal of 42255552690 is 9625555224.

42255552690 is a `hidden beast` number, since 4 + 2 + 2 + 5 + 5 + 552 + 6 + 90 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 24486929289 + 17768623401 = 156483^2 + 133299^2 .

It is a super-2 number, since 2×42255552690² (a number of 22 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1995907 + ... + 2016966.

Almost surely, 2^42255552690 is an apocalyptic number.

42255552690 is an abundant number, since it is smaller than the sum of its proper divisors (80105001318).

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

42255552690 is a wasteful number, since it uses less digits than its factorization.

42255552690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4012905 (or 4012896 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 42255552690 in words is "forty-two billion, two hundred fifty-five million, five hundred fifty-two thousand, six hundred ninety".