99120447556 has 27 divisors (see below), whose sum is σ = 187845828471. Its totient is φ = 45744120864.

The previous prime is 99120447551. The next prime is 99120447563. The reversal of 99120447556 is 65574402199.

The square root of 99120447556 is 314834.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 11039704900 + 88080742656 = 105070^2 + 296784^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99120447551) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8179630 + ... + 8191738.

Almost surely, 2^99120447556 is an apocalyptic number.

99120447556 is the 314834-th square number.

It is an amenable number.

99120447556 is a deficient number, since it is larger than the sum of its proper divisors (88725380915).

99120447556 is an equidigital number, since it uses as much as digits as its factorization.

99120447556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24248 (or 12124 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 99120447556 in words is "ninety-nine billion, one hundred twenty million, four hundred forty-seven thousand, five hundred fifty-six".