99658178064 has 320 divisors, whose sum is σ = 305676110080. Its totient is φ = 31039303680.

The previous prime is 99658178063. The next prime is 99658178069. The reversal of 99658178064 is 46087185699.

It is a junction number, because it is equal to n+sod(n) for n = 99658177992 and 99658178010.

It is not an unprimeable number, because it can be changed into a prime (99658178063) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41924844 + ... + 41927220.

It is an arithmetic number, because the mean of its divisors is an integer number (955237844).

Almost surely, 2^99658178064 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 99658178064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152838055040).

99658178064 is an abundant number, since it is smaller than the sum of its proper divisors (206017932016).

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

99658178064 is a wasteful number, since it uses less digits than its factorization.

99658178064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535 (or 2523 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 99658178064 in words is "ninety-nine billion, six hundred fifty-eight million, one hundred seventy-eight thousand, sixty-four".