99535131512 has 32 divisors (see below), whose sum is σ = 197628076800. Its totient is φ = 46834950144.

The previous prime is 99535131481. The next prime is 99535131571. The reversal of 99535131512 is 21513153599.

It is a happy number.

It is a super-2 number, since 2×99535131512² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1401368 + ... + 1470680.

It is an arithmetic number, because the mean of its divisors is an integer number (6175877400).

Almost surely, 2^99535131512 is an apocalyptic number.

It is an amenable number.

99535131512 is a deficient number, since it is larger than the sum of its proper divisors (98092945288).

99535131512 is a wasteful number, since it uses less digits than its factorization.

99535131512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79895 (or 79891 counting only the distinct ones).

The product of its digits is 182250, while the sum is 44.

The spelling of 99535131512 in words is "ninety-nine billion, five hundred thirty-five million, one hundred thirty-one thousand, five hundred twelve".