44135220129 has 32 divisors (see below), whose sum is σ = 79011308544. Its totient is φ = 21163740480.

The previous prime is 44135220113. The next prime is 44135220133. The reversal of 44135220129 is 92102253144.

It is not a de Polignac number, because 44135220129 - 2⁴ = 44135220113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 44135220129.

It is not an unprimeable number, because it can be changed into a prime (44135220169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7345519 + ... + 7351524.

It is an arithmetic number, because the mean of its divisors is an integer number (2469103392).

Almost surely, 2^44135220129 is an apocalyptic number.

It is an amenable number.

44135220129 is a deficient number, since it is larger than the sum of its proper divisors (34876088415).

44135220129 is a wasteful number, since it uses less digits than its factorization.

44135220129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14697077.

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 44135220129 in words is "forty-four billion, one hundred thirty-five million, two hundred twenty thousand, one hundred twenty-nine".