99181625420 has 48 divisors (see below), whose sum is σ = 221504945760. Its totient is φ = 37174447104.

The previous prime is 99181625399. The next prime is 99181625423. The reversal of 99181625420 is 2452618199.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (99181625423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565355 + ... + 719714.

It is an arithmetic number, because the mean of its divisors is an integer number (4614686370).

Almost surely, 2^99181625420 is an apocalyptic number.

It is an amenable number.

99181625420 is an abundant number, since it is smaller than the sum of its proper divisors (122323320340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99181625420 is a wasteful number, since it uses less digits than its factorization.

99181625420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285322 (or 1285320 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 99181625420 in words is "ninety-nine billion, one hundred eighty-one million, six hundred twenty-five thousand, four hundred twenty".