99391353440 has 24 divisors (see below), whose sum is σ = 234812072880. Its totient is φ = 39756541312.

The previous prime is 99391353437. The next prime is 99391353469. The reversal of 99391353440 is 4435319399.

It is a super-2 number, since 2×99391353440² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310597820 + ... + 310598139.

It is an arithmetic number, because the mean of its divisors is an integer number (9783836370).

Almost surely, 2^99391353440 is an apocalyptic number.

It is an amenable number.

99391353440 is an abundant number, since it is smaller than the sum of its proper divisors (135420719440).

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

99391353440 is a wasteful number, since it uses less digits than its factorization.

99391353440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621195974 (or 621195966 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 50.

The spelling of 99391353440 in words is "ninety-nine billion, three hundred ninety-one million, three hundred fifty-three thousand, four hundred forty".