99777720332 has 6 divisors (see below), whose sum is σ = 174611010588. Its totient is φ = 49888860164.

The previous prime is 99777720283. The next prime is 99777720389. The reversal of 99777720332 is 23302777799.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12472215038 + ... + 12472215045.

It is an arithmetic number, because the mean of its divisors is an integer number (29101835098).

Almost surely, 2^99777720332 is an apocalyptic number.

It is an amenable number.

99777720332 is a deficient number, since it is larger than the sum of its proper divisors (74833290256).

99777720332 is a wasteful number, since it uses less digits than its factorization.

99777720332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24944430087 (or 24944430085 counting only the distinct ones).

The product of its (nonzero) digits is 7001316, while the sum is 56.

The spelling of 99777720332 in words is "ninety-nine billion, seven hundred seventy-seven million, seven hundred twenty thousand, three hundred thirty-two".