40869734557 has 4 divisors (see below), whose sum is σ = 40896120700. Its totient is φ = 40843348416.

The previous prime is 40869734489. The next prime is 40869734567. The reversal of 40869734557 is 75543796804.

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 30322649956 + 10547084601 = 174134^2 + 102699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40869734557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40869734567) 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, 13190748 + ... + 13193845.

It is an arithmetic number, because the mean of its divisors is an integer number (10224030175).

Almost surely, 2^40869734557 is an apocalyptic number.

It is an amenable number.

40869734557 is a deficient number, since it is larger than the sum of its proper divisors (26386143).

40869734557 is a wasteful number, since it uses less digits than its factorization.

40869734557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26386142.

The product of its (nonzero) digits is 25401600, while the sum is 58.

The spelling of 40869734557 in words is "forty billion, eight hundred sixty-nine million, seven hundred thirty-four thousand, five hundred fifty-seven".