44129620621 has 4 divisors (see below), whose sum is σ = 45155890912. Its totient is φ = 43103350332.

The previous prime is 44129620597. The next prime is 44129620669. The reversal of 44129620621 is 12602692144.

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 44129620621 - 2²⁹ = 43592749709 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 (44129630621) 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, 513135081 + ... + 513135166.

It is an arithmetic number, because the mean of its divisors is an integer number (11288972728).

Almost surely, 2^44129620621 is an apocalyptic number.

It is an amenable number.

44129620621 is a deficient number, since it is larger than the sum of its proper divisors (1026270291).

44129620621 is a wasteful number, since it uses less digits than its factorization.

44129620621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026270290.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 44129620621 in words is "forty-four billion, one hundred twenty-nine million, six hundred twenty thousand, six hundred twenty-one".