99761861998 has 8 divisors (see below), whose sum is σ = 149644333800. Its totient is φ = 49880417400.

The previous prime is 99761861993. The next prime is 99761862007. The reversal of 99761861998 is 89916816799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 99761861998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99761861993) 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, 68328 + ... + 451876.

It is an arithmetic number, because the mean of its divisors is an integer number (18705541725).

Almost surely, 2^99761861998 is an apocalyptic number.

99761861998 is a deficient number, since it is larger than the sum of its proper divisors (49882471802).

99761861998 is a wasteful number, since it uses less digits than its factorization.

99761861998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513602.

The product of its digits is 105815808, while the sum is 73.

The spelling of 99761861998 in words is "ninety-nine billion, seven hundred sixty-one million, eight hundred sixty-one thousand, nine hundred ninety-eight".