99206781672 has 16 divisors (see below), whose sum is σ = 248016954240. Its totient is φ = 33068927216.

The previous prime is 99206781649. The next prime is 99206781689. The reversal of 99206781672 is 27618760299.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2066807928 + ... + 2066807975.

It is an arithmetic number, because the mean of its divisors is an integer number (15501059640).

Almost surely, 2^99206781672 is an apocalyptic number.

It is an amenable number.

99206781672 is an abundant number, since it is smaller than the sum of its proper divisors (148810172568).

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

99206781672 is a wasteful number, since it uses less digits than its factorization.

99206781672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4133615912 (or 4133615908 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 57.

The spelling of 99206781672 in words is "ninety-nine billion, two hundred six million, seven hundred eighty-one thousand, six hundred seventy-two".