99671909550723 has 24 divisors (see below), whose sum is σ = 148615342294016. Its totient is φ = 64304200134000.

The previous prime is 99671909550701. The next prime is 99671909550739. The reversal of 99671909550723 is 32705590917699.

99671909550723 is a `hidden beast` number, since 9 + 9 + 6 + 7 + 1 + 9 + 0 + 95 + 507 + 23 = 666.

It is a Cunningham number, because it is equal to 9983582²-1.

It is not a de Polignac number, because 99671909550723 - 2⁶ = 99671909550659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99671909551723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89297586 + ... + 90406872.

Almost surely, 2^{99671909550723} is an apocalyptic number.

99671909550723 is a gapful number since it is divisible by the number (93) formed by its first and last digit.

99671909550723 is a deficient number, since it is larger than the sum of its proper divisors (48943432743293).

99671909550723 is a wasteful number, since it uses less digits than its factorization.

99671909550723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431375 (or 1431372 counting only the distinct ones).

The product of its (nonzero) digits is 289340100, while the sum is 72.

The spelling of 99671909550723 in words is "ninety-nine trillion, six hundred seventy-one billion, nine hundred nine million, five hundred fifty thousand, seven hundred twenty-three".