99556491264 has 256 divisors, whose sum is σ = 288150579360. Its totient is φ = 30450647040.

The previous prime is 99556491259. The next prime is 99556491271. The reversal of 99556491264 is 46219465599.

It is a tau number, because it is divible by the number of its divisors (256).

It is a super-2 number, since 2×99556491264² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99556491198 and 99556491207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68517162 + ... + 68518614.

Almost surely, 2^99556491264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99556491264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144075289680).

99556491264 is an abundant number, since it is smaller than the sum of its proper divisors (188594088096).

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

99556491264 is a wasteful number, since it uses less digits than its factorization.

99556491264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544 (or 1516 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 60.

The spelling of 99556491264 in words is "ninety-nine billion, five hundred fifty-six million, four hundred ninety-one thousand, two hundred sixty-four".