99917604257723 has 16 divisors (see below), whose sum is σ = 115808496145920. Its totient is φ = 84431128992000.

The previous prime is 99917604257701. The next prime is 99917604257761. The reversal of 99917604257723 is 32775240671999.

It is not a de Polignac number, because 99917604257723 - 2³⁰ = 99916530515899 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is not an unprimeable number, because it can be changed into a prime (99917604257123) 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, 787958 + ... + 14158251.

It is an arithmetic number, because the mean of its divisors is an integer number (7238031009120).

Almost surely, 2^{99917604257723} is an apocalyptic number.

99917604257723 is a deficient number, since it is larger than the sum of its proper divisors (15890891888197).

99917604257723 is a wasteful number, since it uses less digits than its factorization.

99917604257723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14959738.

The product of its (nonzero) digits is 360067680, while the sum is 71.

The spelling of 99917604257723 in words is "ninety-nine trillion, nine hundred seventeen billion, six hundred four million, two hundred fifty-seven thousand, seven hundred twenty-three".