99578375574 has 36 divisors (see below), whose sum is σ = 203558550132. Its totient is φ = 32474710160.

The previous prime is 99578375569. The next prime is 99578375579. The reversal of 99578375574 is 47557387599.

It is an interprime number because it is at equal distance from previous prime (99578375569) and next prime (99578375579).

It is a junction number, because it is equal to n+sod(n) for n = 99578375499 and 99578375508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99578375579) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 36327844 + ... + 36330584.

Almost surely, 2^99578375574 is an apocalyptic number.

99578375574 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

99578375574 is an abundant number, since it is smaller than the sum of its proper divisors (103980174558).

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

99578375574 is an frugal number, since it uses more digits than its factorization.

99578375574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5581 (or 2793 counting only the distinct ones).

The product of its digits is 333396000, while the sum is 69.

The spelling of 99578375574 in words is "ninety-nine billion, five hundred seventy-eight million, three hundred seventy-five thousand, five hundred seventy-four".