99601556825 has 12 divisors (see below), whose sum is σ = 126378162768. Its totient is φ = 77828192400.

The previous prime is 99601556807. The next prime is 99601556851. The reversal of 99601556825 is 52865510699.

It is a de Polignac number, because none of the positive numbers 2^k-99601556825 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46325231 + ... + 46327380.

It is an arithmetic number, because the mean of its divisors is an integer number (10531513564).

Almost surely, 2^99601556825 is an apocalyptic number.

It is an amenable number.

99601556825 is a deficient number, since it is larger than the sum of its proper divisors (26776605943).

99601556825 is a wasteful number, since it uses less digits than its factorization.

99601556825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92652664 (or 92652659 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 56.

The spelling of 99601556825 in words is "ninety-nine billion, six hundred one million, five hundred fifty-six thousand, eight hundred twenty-five".