40401513891391 has 16 divisors (see below), whose sum is σ = 41079436372800. Its totient is φ = 39726747648000.

The previous prime is 40401513891377. The next prime is 40401513891443. The reversal of 40401513891391 is 19319831510404.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40401513891391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40401513891091) 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, 42585855 + ... + 43524223.

It is an arithmetic number, because the mean of its divisors is an integer number (2567464773300).

Almost surely, 2^{40401513891391} is an apocalyptic number.

40401513891391 is a deficient number, since it is larger than the sum of its proper divisors (677922481409).

40401513891391 is a wasteful number, since it uses less digits than its factorization.

40401513891391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940050.

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 40401513891391 in words is "forty trillion, four hundred one billion, five hundred thirteen million, eight hundred ninety-one thousand, three hundred ninety-one".