40140466621 has 4 divisors (see below), whose sum is σ = 40141037500. Its totient is φ = 40139895744.

The previous prime is 40140466537. The next prime is 40140466627. The reversal of 40140466621 is 12666404104.

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 13868595225 + 26271871396 = 117765^2 + 162086^2 .

It is a cyclic number.

It is not a de Polignac number, because 40140466621 - 2¹⁷ = 40140335549 is a prime.

It is a super-2 number, since 2×40140466621² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40140466627) 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, 162246 + ... + 326503.

It is an arithmetic number, because the mean of its divisors is an integer number (10035259375).

Almost surely, 2^40140466621 is an apocalyptic number.

It is an amenable number.

40140466621 is a deficient number, since it is larger than the sum of its proper divisors (570879).

40140466621 is an equidigital number, since it uses as much as digits as its factorization.

40140466621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570878.

The product of its (nonzero) digits is 27648, while the sum is 34.

The spelling of 40140466621 in words is "forty billion, one hundred forty million, four hundred sixty-six thousand, six hundred twenty-one".