40817264781 has 16 divisors (see below), whose sum is σ = 56312006400. Its totient is φ = 26267427648.

The previous prime is 40817264777. The next prime is 40817264797. The reversal of 40817264781 is 18746271804.

It is not a de Polignac number, because 40817264781 - 2² = 40817264777 is a prime.

It is a super-2 number, since 2×40817264781² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40817264781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40817264701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367660 + ... + 465626.

It is an arithmetic number, because the mean of its divisors is an integer number (3519500400).

Almost surely, 2^40817264781 is an apocalyptic number.

It is an amenable number.

40817264781 is a deficient number, since it is larger than the sum of its proper divisors (15494741619).

40817264781 is a wasteful number, since it uses less digits than its factorization.

40817264781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102788.

The product of its (nonzero) digits is 602112, while the sum is 48.

The spelling of 40817264781 in words is "forty billion, eight hundred seventeen million, two hundred sixty-four thousand, seven hundred eighty-one".