40242644621 has 4 divisors (see below), whose sum is σ = 40243536000. Its totient is φ = 40241753244.

The previous prime is 40242644567. The next prime is 40242644633. The reversal of 40242644621 is 12644624204.

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 40242644621 - 2³⁰ = 39168902797 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 (40242604621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374141 + ... + 469538.

It is an arithmetic number, because the mean of its divisors is an integer number (10060884000).

Almost surely, 2^40242644621 is an apocalyptic number.

It is an amenable number.

40242644621 is a deficient number, since it is larger than the sum of its proper divisors (891379).

40242644621 is an equidigital number, since it uses as much as digits as its factorization.

40242644621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891378.

The product of its (nonzero) digits is 73728, while the sum is 35.

The spelling of 40242644621 in words is "forty billion, two hundred forty-two million, six hundred forty-four thousand, six hundred twenty-one".