99719127640 has 64 divisors (see below), whose sum is σ = 250457391360. Its totient is φ = 35418203520.

The previous prime is 99719127619. The next prime is 99719127671. The reversal of 99719127640 is 4672191799.

It is a super-2 number, since 2×99719127640² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2616364 + ... + 2654203.

It is an arithmetic number, because the mean of its divisors is an integer number (3913396740).

Almost surely, 2^99719127640 is an apocalyptic number.

It is an amenable number.

99719127640 is an abundant number, since it is smaller than the sum of its proper divisors (150738263720).

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

99719127640 is a wasteful number, since it uses less digits than its factorization.

99719127640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5270632 (or 5270628 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 55.

The spelling of 99719127640 in words is "ninety-nine billion, seven hundred nineteen million, one hundred twenty-seven thousand, six hundred forty".