42656253894 has 24 divisors (see below), whose sum is σ = 92621516832. Its totient is φ = 14188038480.

The previous prime is 42656253889. The next prime is 42656253901. The reversal of 42656253894 is 49835265624.

42656253894 is a `hidden beast` number, since 4 + 2 + 6 + 5 + 625 + 3 + 8 + 9 + 4 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42656253894.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2550837 + ... + 2567504.

It is an arithmetic number, because the mean of its divisors is an integer number (3859229868).

Almost surely, 2^42656253894 is an apocalyptic number.

42656253894 is an abundant number, since it is smaller than the sum of its proper divisors (49965262938).

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

42656253894 is a wasteful number, since it uses less digits than its factorization.

42656253894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5118812 (or 5118809 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 54.

The spelling of 42656253894 in words is "forty-two billion, six hundred fifty-six million, two hundred fifty-three thousand, eight hundred ninety-four".