99631556 has 6 divisors (see below), whose sum is σ = 174355230. Its totient is φ = 49815776.

The previous prime is 99631549. The next prime is 99631583. The reversal of 99631556 is 65513699.

It can be written as a sum of positive squares in only one way, i.e., 73273600 + 26357956 = 8560^2 + 5134^2 .

It is a super-2 number, since 2×99631556² = 19852893901962272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12453941 + ... + 12453948.

It is an arithmetic number, because the mean of its divisors is an integer number (29059205).

Almost surely, 2^99631556 is an apocalyptic number.

It is an amenable number.

99631556 is a deficient number, since it is larger than the sum of its proper divisors (74723674).

99631556 is a wasteful number, since it uses less digits than its factorization.

99631556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24907893 (or 24907891 counting only the distinct ones).

The product of its digits is 218700, while the sum is 44.

The square root of 99631556 is about 9981.5607997948. The cubic root of 99631556 is about 463.5881266279.

The spelling of 99631556 in words is "ninety-nine million, six hundred thirty-one thousand, five hundred fifty-six".