255421155402210 has 128 divisors (see below), whose sum is σ = 719763318005760. Its totient is φ = 56784754301184.

The previous prime is 255421155402197. The next prime is 255421155402229. The reversal of 255421155402210 is 12204551124552.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17243527 + ... + 28428533.

It is an arithmetic number, because the mean of its divisors is an integer number (5623150921920).

Almost surely, 2^{255421155402210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255421155402210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359881659002880).

255421155402210 is an abundant number, since it is smaller than the sum of its proper divisors (464342162603550).

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

255421155402210 is a wasteful number, since it uses less digits than its factorization.

255421155402210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11188000.

The product of its (nonzero) digits is 160000, while the sum is 39.

The spelling of 255421155402210 in words is "two hundred fifty-five trillion, four hundred twenty-one billion, one hundred fifty-five million, four hundred two thousand, two hundred ten".