99896506790977 has 4 divisors (see below), whose sum is σ = 107580853467220. Its totient is φ = 92212160114736.

The previous prime is 99896506790929. The next prime is 99896506790981. The reversal of 99896506790977 is 77909760569899.

It is a Cunningham number, because it is equal to 9994824²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14777596858896 + 85118909932081 = 3844164^2 + 9225991^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99896506790977 is a prime.

It is a super-2 number, since 2×99896506790977² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99896506790891 and 99896506790900.

It is not an unprimeable number, because it can be changed into a prime (99896506790177) 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, 3842173338102 + ... + 3842173338127.

It is an arithmetic number, because the mean of its divisors is an integer number (26895213366805).

Almost surely, 2^{99896506790977} is an apocalyptic number.

It is an amenable number.

99896506790977 is a deficient number, since it is larger than the sum of its proper divisors (7684346676243).

99896506790977 is a wasteful number, since it uses less digits than its factorization.

99896506790977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7684346676242.

The product of its (nonzero) digits is 29165482080, while the sum is 91.

The spelling of 99896506790977 in words is "ninety-nine trillion, eight hundred ninety-six billion, five hundred six million, seven hundred ninety thousand, nine hundred seventy-seven".