40782991669 has 16 divisors (see below), whose sum is σ = 47616883200. Its totient is φ = 34201540224.

The previous prime is 40782991649. The next prime is 40782991699. The reversal of 40782991669 is 96619928704.

It is a cyclic number.

It is not a de Polignac number, because 40782991669 - 2²³ = 40774603061 is a prime.

It is a super-2 number, since 2×40782991669² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40782991609) 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, 1036447 + ... + 1075075.

It is an arithmetic number, because the mean of its divisors is an integer number (2976055200).

Almost surely, 2^40782991669 is an apocalyptic number.

It is an amenable number.

40782991669 is a deficient number, since it is larger than the sum of its proper divisors (6833891531).

40782991669 is a wasteful number, since it uses less digits than its factorization.

40782991669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41892.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 40782991669 in words is "forty billion, seven hundred eighty-two million, nine hundred ninety-one thousand, six hundred sixty-nine".