99720714772 has 36 divisors (see below), whose sum is σ = 203045410260. Its totient is φ = 42728496384.

The previous prime is 99720714763. The next prime is 99720714803. The reversal of 99720714772 is 27741702799.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 51476349456 + 48244365316 = 226884^2 + 219646^2 .

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 11 ways as a sum of consecutive naturals, for example, 930978 + ... + 1032550.

It is an arithmetic number, because the mean of its divisors is an integer number (5640150285).

Almost surely, 2^99720714772 is an apocalyptic number.

It is an amenable number.

99720714772 is an abundant number, since it is smaller than the sum of its proper divisors (103324695488).

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

99720714772 is a wasteful number, since it uses less digits than its factorization.

99720714772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106600 (or 106591 counting only the distinct ones).

The product of its (nonzero) digits is 3111696, while the sum is 55.

The spelling of 99720714772 in words is "ninety-nine billion, seven hundred twenty million, seven hundred fourteen thousand, seven hundred seventy-two".