99636348780661 has 16 divisors (see below), whose sum is σ = 124266449645568. Its totient is φ = 77610895642800.

The previous prime is 99636348780641. The next prime is 99636348780799. The reversal of 99636348780661 is 16608784363699.

It is a cyclic number.

It is not a de Polignac number, because 99636348780661 - 2⁹ = 99636348780149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99636348780641) 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, 231597805 + ... + 232027618.

It is an arithmetic number, because the mean of its divisors is an integer number (7766653102848).

Almost surely, 2^{99636348780661} is an apocalyptic number.

It is an amenable number.

99636348780661 is a deficient number, since it is larger than the sum of its proper divisors (24630100864907).

99636348780661 is a wasteful number, since it uses less digits than its factorization.

99636348780661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463628232.

The product of its (nonzero) digits is 1693052928, while the sum is 76.

The spelling of 99636348780661 in words is "ninety-nine trillion, six hundred thirty-six billion, three hundred forty-eight million, seven hundred eighty thousand, six hundred sixty-one".