198269615478 has 32 divisors (see below), whose sum is σ = 432607236480. Its totient is φ = 60079064960.

The previous prime is 198269615407. The next prime is 198269615491. The reversal of 198269615478 is 874516962891.

It is a super-3 number, since 3×198269615478³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a Curzon number.

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, 1882333 + ... + 1984871.

It is an arithmetic number, because the mean of its divisors is an integer number (13518976140).

Almost surely, 2^198269615478 is an apocalyptic number.

198269615478 is an abundant number, since it is smaller than the sum of its proper divisors (234337621002).

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

198269615478 is a wasteful number, since it uses less digits than its factorization.

198269615478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131852.

The product of its digits is 52254720, while the sum is 66.

The spelling of 198269615478 in words is "one hundred ninety-eight billion, two hundred sixty-nine million, six hundred fifteen thousand, four hundred seventy-eight".