44149011621 has 16 divisors (see below), whose sum is σ = 69156494400. Its totient is φ = 24698747520.

The previous prime is 44149011593. The next prime is 44149011637. The reversal of 44149011621 is 12611094144.

It is not a de Polignac number, because 44149011621 - 2¹⁹ = 44148487333 is a prime.

It is a super-2 number, since 2×44149011621² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44149011661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51455296 + ... + 51456153.

It is an arithmetic number, because the mean of its divisors is an integer number (4322280900).

Almost surely, 2^44149011621 is an apocalyptic number.

It is an amenable number.

44149011621 is a deficient number, since it is larger than the sum of its proper divisors (25007482779).

44149011621 is a wasteful number, since it uses less digits than its factorization.

44149011621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102911476.

The product of its (nonzero) digits is 6912, while the sum is 33.

The spelling of 44149011621 in words is "forty-four billion, one hundred forty-nine million, eleven thousand, six hundred twenty-one".