99647863761 has 8 divisors (see below), whose sum is σ = 133459621120. Its totient is φ = 66134007792.

The previous prime is 99647863739. The next prime is 99647863781. The reversal of 99647863761 is 16736874699.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99647863761 - 2⁵ = 99647863729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99647863692 and 99647863701.

It is not an unprimeable number, because it can be changed into a prime (99647863781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74474566 + ... + 74475903.

It is an arithmetic number, because the mean of its divisors is an integer number (16682452640).

Almost surely, 2^99647863761 is an apocalyptic number.

It is an amenable number.

99647863761 is a deficient number, since it is larger than the sum of its proper divisors (33811757359).

99647863761 is a wasteful number, since it uses less digits than its factorization.

99647863761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148950695.

The product of its digits is 82301184, while the sum is 66.

The spelling of 99647863761 in words is "ninety-nine billion, six hundred forty-seven million, eight hundred sixty-three thousand, seven hundred sixty-one".