99479186128 has 120 divisors (see below), whose sum is σ = 229332964608. Its totient is φ = 41665897728.

The previous prime is 99479186111. The next prime is 99479186129. The reversal of 99479186128 is 82168197499.

It is a happy number.

99479186128 is a nontrivial binomial coefficient, being equal to C(446048, 2).

It is a super-2 number, since 2×99479186128² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99479186128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99479186129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10923625 + ... + 10932727.

Almost surely, 2^99479186128 is an apocalyptic number.

99479186128 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

99479186128 is the 446047-th triangular number and also the 223024-th hexagonal number.

99479186128 is the 148683-rd centered nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99479186128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114666482304).

99479186128 is an abundant number, since it is smaller than the sum of its proper divisors (129853778480).

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

99479186128 is a wasteful number, since it uses less digits than its factorization.

99479186128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9441 (or 9428 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 64.

The spelling of 99479186128 in words is "ninety-nine billion, four hundred seventy-nine million, one hundred eighty-six thousand, one hundred twenty-eight".