42920407956 has 24 divisors (see below), whose sum is σ = 101083580640. Its totient is φ = 14173093792.

The previous prime is 42920407861. The next prime is 42920407991. The reversal of 42920407956 is 65970402924.

It is a super-2 number, since 2×42920407956² (a number of 22 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 16712271 + ... + 16714838.

It is an arithmetic number, because the mean of its divisors is an integer number (4211815860).

Almost surely, 2^42920407956 is an apocalyptic number.

It is an amenable number.

42920407956 is an abundant number, since it is smaller than the sum of its proper divisors (58163172684).

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

42920407956 is a wasteful number, since it uses less digits than its factorization.

42920407956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33427223 (or 33427221 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 42920407956 in words is "forty-two billion, nine hundred twenty million, four hundred seven thousand, nine hundred fifty-six".