99777374045 has 16 divisors (see below), whose sum is σ = 127209184560. Its totient is φ = 74986458624.

The previous prime is 99777374033. The next prime is 99777374057. The reversal of 99777374045 is 54047377799.

It is an interprime number because it is at equal distance from previous prime (99777374033) and next prime (99777374057).

It can be written as a sum of positive squares in 8 ways, for example, as 26900592196 + 72876781849 = 164014^2 + 269957^2 .

It is a cyclic number.

It is not a de Polignac number, because 99777374045 - 2¹⁶ = 99777308509 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9293552 + ... + 9304281.

It is an arithmetic number, because the mean of its divisors is an integer number (7950574035).

Almost surely, 2^99777374045 is an apocalyptic number.

It is an amenable number.

99777374045 is a deficient number, since it is larger than the sum of its proper divisors (27431810515).

99777374045 is a wasteful number, since it uses less digits than its factorization.

99777374045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18597904.

The product of its (nonzero) digits is 46675440, while the sum is 62.

The spelling of 99777374045 in words is "ninety-nine billion, seven hundred seventy-seven million, three hundred seventy-four thousand, forty-five".