99609421320 has 48 divisors (see below), whose sum is σ = 323730620460. Its totient is φ = 26562512256.

The previous prime is 99609421259. The next prime is 99609421369. The reversal of 99609421320 is 2312490699.

It is a happy number.

99609421320 is a `hidden beast` number, since 9 + 9 + 609 + 4 + 2 + 1 + 32 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 98594744004 + 1014677316 = 313998^2 + 31854^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138346059 + ... + 138346778.

Almost surely, 2^99609421320 is an apocalyptic number.

99609421320 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99609421320 is an abundant number, since it is smaller than the sum of its proper divisors (224121199140).

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

99609421320 is a wasteful number, since it uses less digits than its factorization.

99609421320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276692854 (or 276692847 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 99609421320 in words is "ninety-nine billion, six hundred nine million, four hundred twenty-one thousand, three hundred twenty".