99427650311890 has 32 divisors (see below), whose sum is σ = 179071718132736. Its totient is φ = 39748406617920.

The previous prime is 99427650311867. The next prime is 99427650311911. The reversal of 99427650311890 is 9811305672499.

It is a super-2 number, since 2×99427650311890² (a number of 29 digits) contains 22 as substring.

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, 655204464 + ... + 655356196.

It is an arithmetic number, because the mean of its divisors is an integer number (5595991191648).

It is a 1-persistent number, because it is pandigital, but 2⋅99427650311890 = 198855300623780 is not.

Almost surely, 2^{99427650311890} is an apocalyptic number.

99427650311890 is a deficient number, since it is larger than the sum of its proper divisors (79644067820846).

99427650311890 is a wasteful number, since it uses less digits than its factorization.

99427650311890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188634.

The product of its (nonzero) digits is 29393280, while the sum is 64.

The spelling of 99427650311890 in words is "ninety-nine trillion, four hundred twenty-seven billion, six hundred fifty million, three hundred eleven thousand, eight hundred ninety".