40131718828621 has 4 divisors (see below), whose sum is σ = 45864821518432. Its totient is φ = 34398616138812.

The previous prime is 40131718828609. The next prime is 40131718828639. The reversal of 40131718828621 is 12682881713104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40131718828621 - 2¹⁵ = 40131718795853 is a prime.

It is a super-2 number, since 2×40131718828621² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40131718828661) 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, 2866551344895 + ... + 2866551344908.

It is an arithmetic number, because the mean of its divisors is an integer number (11466205379608).

Almost surely, 2^{40131718828621} is an apocalyptic number.

It is an amenable number.

40131718828621 is a deficient number, since it is larger than the sum of its proper divisors (5733102689811).

40131718828621 is an equidigital number, since it uses as much as digits as its factorization.

40131718828621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5733102689810.

The product of its (nonzero) digits is 1032192, while the sum is 52.

The spelling of 40131718828621 in words is "forty trillion, one hundred thirty-one billion, seven hundred eighteen million, eight hundred twenty-eight thousand, six hundred twenty-one".