99511560 has 96 divisors (see below), whose sum is σ = 327600000. Its totient is φ = 26193024.

The previous prime is 99511543. The next prime is 99511597. The reversal of 99511560 is 6511599.

99511560 is a `hidden beast` number, since 9 + 95 + 1 + 1 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26691 + ... + 30189.

It is an arithmetic number, because the mean of its divisors is an integer number (3412500).

Almost surely, 2^99511560 is an apocalyptic number.

99511560 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99511560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163800000).

99511560 is an abundant number, since it is smaller than the sum of its proper divisors (228088440).

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

99511560 is a wasteful number, since it uses less digits than its factorization.

99511560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3595 (or 3588 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 36.

The square root of 99511560 is about 9975.5481052421. The cubic root of 99511560 is about 463.4019370608.

It can be divided in two parts, 9951 and 1560, that added together give a palindrome (11511).

The spelling of 99511560 in words is "ninety-nine million, five hundred eleven thousand, five hundred sixty".