155890604420 has 24 divisors (see below), whose sum is σ = 327385996224. Its totient is φ = 62353246176.

The previous prime is 155890604411. The next prime is 155890604563. The reversal of 155890604420 is 24406098551.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266297 + ... + 618623.

It is an arithmetic number, because the mean of its divisors is an integer number (13641083176).

Almost surely, 2^155890604420 is an apocalyptic number.

155890604420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155890604420 is an abundant number, since it is smaller than the sum of its proper divisors (171495391804).

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

155890604420 is a wasteful number, since it uses less digits than its factorization.

155890604420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374459 (or 374457 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 155890604420 in words is "one hundred fifty-five billion, eight hundred ninety million, six hundred four thousand, four hundred twenty".