40156120020 has 24 divisors (see below), whose sum is σ = 112437136224. Its totient is φ = 10708298656.

The previous prime is 40156119929. The next prime is 40156120031. The reversal of 40156120020 is 2002165104.

It is a super-2 number, since 2×40156120020² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334634274 + ... + 334634393.

It is an arithmetic number, because the mean of its divisors is an integer number (4684880676).

Almost surely, 2^40156120020 is an apocalyptic number.

It is an amenable number.

40156120020 is an abundant number, since it is smaller than the sum of its proper divisors (72281016204).

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

40156120020 is a wasteful number, since it uses less digits than its factorization.

40156120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669268679 (or 669268677 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 40156120020 its reverse (2002165104), we get a palindrome (42158285124).

The spelling of 40156120020 in words is "forty billion, one hundred fifty-six million, one hundred twenty thousand, twenty".