40391934567 has 32 divisors (see below), whose sum is σ = 60057158400. Its totient is φ = 23997270528.

The previous prime is 40391934553. The next prime is 40391934607. The reversal of 40391934567 is 76543919304.

It is not a de Polignac number, because 40391934567 - 2⁴ = 40391934551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40391934547) 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, 1994788 + ... + 2014934.

It is an arithmetic number, because the mean of its divisors is an integer number (1876786200).

Almost surely, 2^40391934567 is an apocalyptic number.

40391934567 is a deficient number, since it is larger than the sum of its proper divisors (19665223833).

40391934567 is a wasteful number, since it uses less digits than its factorization.

40391934567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22255.

The product of its (nonzero) digits is 2449440, while the sum is 51.

The spelling of 40391934567 in words is "forty billion, three hundred ninety-one million, nine hundred thirty-four thousand, five hundred sixty-seven".