40456817892 has 36 divisors (see below), whose sum is σ = 102272595516. Its totient is φ = 13484715840.

The previous prime is 40456817879. The next prime is 40456817897. The reversal of 40456817892 is 29871865404.

It is a happy number.

40456817892 is a `hidden beast` number, since 4 + 0 + 4 + 568 + 1 + 78 + 9 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18450875556 + 22005942336 = 135834^2 + 148344^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×40456817892² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40456817897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 737478 + ... + 790434.

It is an arithmetic number, because the mean of its divisors is an integer number (2840905431).

Almost surely, 2^40456817892 is an apocalyptic number.

It is an amenable number.

40456817892 is an abundant number, since it is smaller than the sum of its proper divisors (61815777624).

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

40456817892 is a wasteful number, since it uses less digits than its factorization.

40456817892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74188 (or 74183 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 40456817892 in words is "forty billion, four hundred fifty-six million, eight hundred seventeen thousand, eight hundred ninety-two".