40439137536 has 108 divisors (see below), whose sum is σ = 133252627872. Its totient is φ = 11554034688.

The previous prime is 40439137513. The next prime is 40439137547. The reversal of 40439137536 is 63573193404.

40439137536 is a `hidden beast` number, since 40 + 43 + 9 + 1 + 37 + 536 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 40439137491 and 40439137500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1237566 + ... + 1269821.

Almost surely, 2^40439137536 is an apocalyptic number.

It is an amenable number.

40439137536 is an abundant number, since it is smaller than the sum of its proper divisors (92813490336).

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

40439137536 is a wasteful number, since it uses less digits than its factorization.

40439137536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507416 (or 2507399 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 45.

The spelling of 40439137536 in words is "forty billion, four hundred thirty-nine million, one hundred thirty-seven thousand, five hundred thirty-six".