154421474878220 has 48 divisors (see below), whose sum is σ = 354300758483616. Its totient is φ = 56068311552000.

The previous prime is 154421474878193. The next prime is 154421474878241. The reversal of 154421474878220 is 22878474124451.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 154421474878220.

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, 530804501 + ... + 531095340.

It is an arithmetic number, because the mean of its divisors is an integer number (7381265801742).

Almost surely, 2^{154421474878220} is an apocalyptic number.

154421474878220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154421474878220 is an abundant number, since it is smaller than the sum of its proper divisors (199879283605396).

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

154421474878220 is a wasteful number, since it uses less digits than its factorization.

154421474878220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061900522 (or 1061900520 counting only the distinct ones).

The product of its (nonzero) digits is 32112640, while the sum is 59.

The spelling of 154421474878220 in words is "one hundred fifty-four trillion, four hundred twenty-one billion, four hundred seventy-four million, eight hundred seventy-eight thousand, two hundred twenty".