40396471791 has 16 divisors (see below), whose sum is σ = 58009190400. Its totient is φ = 24857652960.

The previous prime is 40396471777. The next prime is 40396471831. The reversal of 40396471791 is 19717469304.

It is not a de Polignac number, because 40396471791 - 2³⁰ = 39322729967 is a prime.

It is a super-2 number, since 2×40396471791² (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 (40396471711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 763410 + ... + 814608.

It is an arithmetic number, because the mean of its divisors is an integer number (3625574400).

Almost surely, 2^40396471791 is an apocalyptic number.

40396471791 is a deficient number, since it is larger than the sum of its proper divisors (17612718609).

40396471791 is a wasteful number, since it uses less digits than its factorization.

40396471791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71446.

The product of its (nonzero) digits is 1143072, while the sum is 51.

The spelling of 40396471791 in words is "forty billion, three hundred ninety-six million, four hundred seventy-one thousand, seven hundred ninety-one".