99993656761 has 4 divisors (see below), whose sum is σ = 103219258624. Its totient is φ = 96768054900.

The previous prime is 99993656743. The next prime is 99993656783. The reversal of 99993656761 is 16765639999.

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.

It is a cyclic number.

It is not a de Polignac number, because 99993656761 - 2¹³ = 99993648569 is a prime.

It is a super-2 number, since 2×99993656761² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99993651761) 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, 1612800885 + ... + 1612800946.

It is an arithmetic number, because the mean of its divisors is an integer number (25804814656).

Almost surely, 2^99993656761 is an apocalyptic number.

It is an amenable number.

99993656761 is a deficient number, since it is larger than the sum of its proper divisors (3225601863).

99993656761 is a wasteful number, since it uses less digits than its factorization.

99993656761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3225601862.

The product of its digits is 148803480, while the sum is 70.

The spelling of 99993656761 in words is "ninety-nine billion, nine hundred ninety-three million, six hundred fifty-six thousand, seven hundred sixty-one".