99427679027840 has 256 divisors, whose sum is σ = 247876449972480. Its totient is φ = 38104821006336.

The previous prime is 99427679027753. The next prime is 99427679027869. The reversal of 99427679027840 is 4872097672499.

It is a Harshad number since it is a multiple of its sum of digits (74).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 423020432 + ... + 423255408.

It is an arithmetic number, because the mean of its divisors is an integer number (968267382705).

Almost surely, 2^{99427679027840} 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 99427679027840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123938224986240).

99427679027840 is an abundant number, since it is smaller than the sum of its proper divisors (148448770944640).

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

99427679027840 is a wasteful number, since it uses less digits than its factorization.

99427679027840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235307 (or 235295 counting only the distinct ones).

The product of its (nonzero) digits is 768144384, while the sum is 74.

The spelling of 99427679027840 in words is "ninety-nine trillion, four hundred twenty-seven billion, six hundred seventy-nine million, twenty-seven thousand, eight hundred forty".