40391702661 has 16 divisors (see below), whose sum is σ = 54213465600. Its totient is φ = 26749081968.

The previous prime is 40391702629. The next prime is 40391702677. The reversal of 40391702661 is 16620719304.

It is not a de Polignac number, because 40391702661 - 2⁵ = 40391702629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40391702621) 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, 765550 + ... + 816608.

It is an arithmetic number, because the mean of its divisors is an integer number (3388341600).

Almost surely, 2^40391702661 is an apocalyptic number.

It is an amenable number.

40391702661 is a deficient number, since it is larger than the sum of its proper divisors (13821762939).

40391702661 is a wasteful number, since it uses less digits than its factorization.

40391702661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52808.

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 40391702661 in words is "forty billion, three hundred ninety-one million, seven hundred two thousand, six hundred sixty-one".