40267904391 has 48 divisors (see below), whose sum is σ = 71929952640. Its totient is φ = 21341828160.

The previous prime is 40267904387. The next prime is 40267904401. The reversal of 40267904391 is 19340976204.

It is a happy number.

It is not a de Polignac number, because 40267904391 - 2² = 40267904387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40267904311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 798921 + ... + 847826.

It is an arithmetic number, because the mean of its divisors is an integer number (1498540680).

Almost surely, 2^40267904391 is an apocalyptic number.

40267904391 is a deficient number, since it is larger than the sum of its proper divisors (31662048249).

40267904391 is a wasteful number, since it uses less digits than its factorization.

40267904391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646796 (or 1646793 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 40267904391 in words is "forty billion, two hundred sixty-seven million, nine hundred four thousand, three hundred ninety-one".