44378570091 has 16 divisors (see below), whose sum is σ = 63356061600. Its totient is φ = 27532505088.

The previous prime is 44378570069. The next prime is 44378570107. The reversal of 44378570091 is 19007587344.

It is a happy number.

It is not a de Polignac number, because 44378570091 - 2⁵ = 44378570059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 44378570091.

It is not an unprimeable number, because it can be changed into a prime (44378574091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4884046 + ... + 4893123.

It is an arithmetic number, because the mean of its divisors is an integer number (3959753850).

Almost surely, 2^44378570091 is an apocalyptic number.

44378570091 is a deficient number, since it is larger than the sum of its proper divisors (18977491509).

44378570091 is a wasteful number, since it uses less digits than its factorization.

44378570091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9777278.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 44378570091 in words is "forty-four billion, three hundred seventy-eight million, five hundred seventy thousand, ninety-one".