99999904651 has 4 divisors (see below), whose sum is σ = 100166850000. Its totient is φ = 99832959304.

The previous prime is 99999904649. The next prime is 99999904673. The reversal of 99999904651 is 15640999999.

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

It is a cyclic number.

It is not a de Polignac number, because 99999904651 - 2¹ = 99999904649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99999904751) 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, 83471776 + ... + 83472973.

It is an arithmetic number, because the mean of its divisors is an integer number (25041712500).

Almost surely, 2^99999904651 is an apocalyptic number.

99999904651 is a deficient number, since it is larger than the sum of its proper divisors (166945349).

99999904651 is a wasteful number, since it uses less digits than its factorization.

99999904651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166945348.

The product of its (nonzero) digits is 63772920, while the sum is 70.

The spelling of 99999904651 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred four thousand, six hundred fifty-one".