155612215650556 has 96 divisors (see below), whose sum is σ = 319910313985920. Its totient is φ = 64841167872000.

The previous prime is 155612215650421. The next prime is 155612215650607. The reversal of 155612215650556 is 655056512216551.

155612215650556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 155612215650497 and 155612215650506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 491953906 + ... + 492270118.

It is an arithmetic number, because the mean of its divisors is an integer number (3332399104020).

Almost surely, 2^{155612215650556} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155612215650556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159955156992960).

155612215650556 is an abundant number, since it is smaller than the sum of its proper divisors (164298098335364).

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

155612215650556 is a wasteful number, since it uses less digits than its factorization.

155612215650556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317735 (or 317733 counting only the distinct ones).

The product of its (nonzero) digits is 13500000, while the sum is 55.

The spelling of 155612215650556 in words is "one hundred fifty-five trillion, six hundred twelve billion, two hundred fifteen million, six hundred fifty thousand, five hundred fifty-six".