40013125278 has 64 divisors (see below), whose sum is σ = 96312944640. Its totient is φ = 10826034912.

The previous prime is 40013125249. The next prime is 40013125279. The reversal of 40013125278 is 87252131004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40013125279) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2150925 + ... + 2169447.

It is an arithmetic number, because the mean of its divisors is an integer number (1504889760).

Almost surely, 2^40013125278 is an apocalyptic number.

40013125278 is an abundant number, since it is smaller than the sum of its proper divisors (56299819362).

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

40013125278 is a wasteful number, since it uses less digits than its factorization.

40013125278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21261.

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 40013125278 in words is "forty billion, thirteen million, one hundred twenty-five thousand, two hundred seventy-eight".