44784806891 has 24 divisors (see below), whose sum is σ = 52561259520. Its totient is φ = 38037550320.

The previous prime is 44784806887. The next prime is 44784806903. The reversal of 44784806891 is 19860848744.

It is not a de Polignac number, because 44784806891 - 2² = 44784806887 is a prime.

It is a super-2 number, since 2×44784806891² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 44784806891.

It is not an unprimeable number, because it can be changed into a prime (44784806861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67451 + ... + 306788.

It is an arithmetic number, because the mean of its divisors is an integer number (2190052480).

Almost surely, 2^44784806891 is an apocalyptic number.

44784806891 is a deficient number, since it is larger than the sum of its proper divisors (7776452629).

44784806891 is a wasteful number, since it uses less digits than its factorization.

44784806891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374327 (or 374316 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 59.

The spelling of 44784806891 in words is "forty-four billion, seven hundred eighty-four million, eight hundred six thousand, eight hundred ninety-one".