99774451518 has 64 divisors (see below), whose sum is σ = 240267479040. Its totient is φ = 26983145952.

The previous prime is 99774451501. The next prime is 99774451531. The reversal of 99774451518 is 81515447799.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 874321 + ... + 981827.

It is an arithmetic number, because the mean of its divisors is an integer number (3754179360).

Almost surely, 2^99774451518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99774451518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120133739520).

99774451518 is an abundant number, since it is smaller than the sum of its proper divisors (140493027522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99774451518 is a wasteful number, since it uses less digits than its factorization.

99774451518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108701.

The product of its digits is 12700800, while the sum is 60.

The spelling of 99774451518 in words is "ninety-nine billion, seven hundred seventy-four million, four hundred fifty-one thousand, five hundred eighteen".