99720701405 has 16 divisors (see below), whose sum is σ = 128915781120. Its totient is φ = 73613644608.

The previous prime is 99720701401. The next prime is 99720701429. The reversal of 99720701405 is 50410702799.

It is a cyclic number.

It is not a de Polignac number, because 99720701405 - 2² = 99720701401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99720701401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88877 + ... + 455346.

It is an arithmetic number, because the mean of its divisors is an integer number (8057236320).

Almost surely, 2^99720701405 is an apocalyptic number.

It is an amenable number.

99720701405 is a deficient number, since it is larger than the sum of its proper divisors (29195079715).

99720701405 is a wasteful number, since it uses less digits than its factorization.

99720701405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547060.

The product of its (nonzero) digits is 158760, while the sum is 44.

The spelling of 99720701405 in words is "ninety-nine billion, seven hundred twenty million, seven hundred one thousand, four hundred five".