154991454198 has 48 divisors (see below), whose sum is σ = 363012548400. Its totient is φ = 43986057024.

The previous prime is 154991454197. The next prime is 154991454203. The reversal of 154991454198 is 891454199451.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154991454197) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1725261 + ... + 1812872.

It is an arithmetic number, because the mean of its divisors is an integer number (7562761425).

Almost surely, 2^154991454198 is an apocalyptic number.

154991454198 is an abundant number, since it is smaller than the sum of its proper divisors (208021094202).

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

154991454198 is a wasteful number, since it uses less digits than its factorization.

154991454198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538301 (or 3538294 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 60.

The spelling of 154991454198 in words is "one hundred fifty-four billion, nine hundred ninety-one million, four hundred fifty-four thousand, one hundred ninety-eight".