40138061279 has 16 divisors (see below), whose sum is σ = 43481971200. Its totient is φ = 36921528864.

The previous prime is 40138061269. The next prime is 40138061303. The reversal of 40138061279 is 97216083104.

It is a cyclic number.

It is not a de Polignac number, because 40138061279 - 2⁸ = 40138061023 is a prime.

It is a super-2 number, since 2×40138061279² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40138061269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283742 + ... + 400980.

It is an arithmetic number, because the mean of its divisors is an integer number (2717623200).

Almost surely, 2^40138061279 is an apocalyptic number.

40138061279 is a deficient number, since it is larger than the sum of its proper divisors (3343909921).

40138061279 is a wasteful number, since it uses less digits than its factorization.

40138061279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117782.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 40138061279 in words is "forty billion, one hundred thirty-eight million, sixty-one thousand, two hundred seventy-nine".