40803569657 has 4 divisors (see below), whose sum is σ = 41362522740. Its totient is φ = 40244616576.

The previous prime is 40803569633. The next prime is 40803569671. The reversal of 40803569657 is 75696530804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29097195241 + 11706374416 = 170579^2 + 108196^2 .

It is a cyclic number.

It is not a de Polignac number, because 40803569657 - 2⁶ = 40803569593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40803569599 and 40803569608.

It is not an unprimeable number, because it can be changed into a prime (40803569057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279476432 + ... + 279476577.

It is an arithmetic number, because the mean of its divisors is an integer number (10340630685).

Almost surely, 2^40803569657 is an apocalyptic number.

It is an amenable number.

40803569657 is a deficient number, since it is larger than the sum of its proper divisors (558953083).

40803569657 is an equidigital number, since it uses as much as digits as its factorization.

40803569657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558953082.

The product of its (nonzero) digits is 5443200, while the sum is 53.

The spelling of 40803569657 in words is "forty billion, eight hundred three million, five hundred sixty-nine thousand, six hundred fifty-seven".