40072599639 has 64 divisors (see below), whose sum is σ = 61615572480. Its totient is φ = 25722282240.

The previous prime is 40072599613. The next prime is 40072599653. The reversal of 40072599639 is 93699527004.

40072599639 is a `hidden beast` number, since 40 + 0 + 7 + 2 + 599 + 6 + 3 + 9 = 666.

It is not a de Polignac number, because 40072599639 - 2¹² = 40072595543 is a prime.

It is a super-3 number, since 3×40072599639³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40072599239) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44181024 + ... + 44181930.

It is an arithmetic number, because the mean of its divisors is an integer number (962743320).

Almost surely, 2^40072599639 is an apocalyptic number.

40072599639 is a deficient number, since it is larger than the sum of its proper divisors (21542972841).

40072599639 is a wasteful number, since it uses less digits than its factorization.

40072599639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437 (or 1431 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 54.

The spelling of 40072599639 in words is "forty billion, seventy-two million, five hundred ninety-nine thousand, six hundred thirty-nine".