99727111332431 has 4 divisors (see below), whose sum is σ = 108793212362664. Its totient is φ = 90661010302200.

The previous prime is 99727111332389. The next prime is 99727111332437. The reversal of 99727111332431 is 13423311172799.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99727111332431 is a prime.

It is a super-2 number, since 2×99727111332431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99727111332437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4533050515100 + ... + 4533050515121.

It is an arithmetic number, because the mean of its divisors is an integer number (27198303090666).

Almost surely, 2^{99727111332431} is an apocalyptic number.

99727111332431 is a deficient number, since it is larger than the sum of its proper divisors (9066101030233).

99727111332431 is a wasteful number, since it uses less digits than its factorization.

99727111332431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9066101030232.

The product of its digits is 1714608, while the sum is 53.

The spelling of 99727111332431 in words is "ninety-nine trillion, seven hundred twenty-seven billion, one hundred eleven million, three hundred thirty-two thousand, four hundred thirty-one".