99717255451 has 16 divisors (see below), whose sum is σ = 111382801920. Its totient is φ = 88495024480.

The previous prime is 99717255433. The next prime is 99717255461. The reversal of 99717255451 is 15455271799.

It is a cyclic number.

It is not a de Polignac number, because 99717255451 - 2⁹ = 99717254939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99717255392 and 99717255401.

It is not an unprimeable number, because it can be changed into a prime (99717255431) 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, 46801 + ... + 449026.

It is an arithmetic number, because the mean of its divisors is an integer number (6961425120).

Almost surely, 2^99717255451 is an apocalyptic number.

99717255451 is a deficient number, since it is larger than the sum of its proper divisors (11665546469).

99717255451 is a wasteful number, since it uses less digits than its factorization.

99717255451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496274.

The product of its digits is 3969000, while the sum is 55.

The spelling of 99717255451 in words is "ninety-nine billion, seven hundred seventeen million, two hundred fifty-five thousand, four hundred fifty-one".