155111660560 has 80 divisors (see below), whose sum is σ = 370648973376. Its totient is φ = 60334493184.

The previous prime is 155111660519. The next prime is 155111660563. The reversal of 155111660560 is 65066111551.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (155111660563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681562 + ... + 880198.

Almost surely, 2^155111660560 is an apocalyptic number.

155111660560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155111660560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185324486688).

155111660560 is an abundant number, since it is smaller than the sum of its proper divisors (215537312816).

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

155111660560 is a wasteful number, since it uses less digits than its factorization.

155111660560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198920 (or 198914 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 155111660560 in words is "one hundred fifty-five billion, one hundred eleven million, six hundred sixty thousand, five hundred sixty".