99555901606 has 32 divisors (see below), whose sum is σ = 174286094400. Its totient is φ = 42633537408.

The previous prime is 99555901573. The next prime is 99555901633. The reversal of 99555901606 is 60610955599.

It is a happy number.

It is a super-2 number, since 2×99555901606² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 833796 + ... + 945688.

It is an arithmetic number, because the mean of its divisors is an integer number (5446440450).

Almost surely, 2^99555901606 is an apocalyptic number.

99555901606 is a deficient number, since it is larger than the sum of its proper divisors (74730192794).

99555901606 is a wasteful number, since it uses less digits than its factorization.

99555901606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113213 (or 113199 counting only the distinct ones).

The product of its (nonzero) digits is 3280500, while the sum is 55.

The spelling of 99555901606 in words is "ninety-nine billion, five hundred fifty-five million, nine hundred one thousand, six hundred six".