405640692769 has 16 divisors (see below), whose sum is σ = 447054228544. Its totient is φ = 365687784000.

The previous prime is 405640692749. The next prime is 405640692799. The reversal of 405640692769 is 967296046504.

It is a cyclic number.

It is not a de Polignac number, because 405640692769 - 2¹⁵ = 405640660001 is a prime.

It is a super-2 number, since 2×405640692769² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405640692719) 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, 5498014 + ... + 5571304.

It is an arithmetic number, because the mean of its divisors is an integer number (27940889284).

Almost surely, 2^405640692769 is an apocalyptic number.

It is an amenable number.

405640692769 is a deficient number, since it is larger than the sum of its proper divisors (41413535775).

405640692769 is a wasteful number, since it uses less digits than its factorization.

405640692769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83248.

The product of its (nonzero) digits is 19595520, while the sum is 58.

The spelling of 405640692769 in words is "four hundred five billion, six hundred forty million, six hundred ninety-two thousand, seven hundred sixty-nine".