99717255401 has 4 divisors (see below), whose sum is σ = 99718275072. Its totient is φ = 99716235732.

The previous prime is 99717255373. The next prime is 99717255431. The reversal of 99717255401 is 10455271799.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10455271799 = 7 ⋅1493610257.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99717255401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 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 3 ways as a sum of consecutive naturals, for example, 345485 + ... + 564618.

It is an arithmetic number, because the mean of its divisors is an integer number (24929568768).

Almost surely, 2^99717255401 is an apocalyptic number.

It is an amenable number.

99717255401 is a deficient number, since it is larger than the sum of its proper divisors (1019671).

99717255401 is a wasteful number, since it uses less digits than its factorization.

99717255401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019670.

The product of its (nonzero) digits is 793800, while the sum is 50.

The spelling of 99717255401 in words is "ninety-nine billion, seven hundred seventeen million, two hundred fifty-five thousand, four hundred one".