155315516580580 has 96 divisors (see below), whose sum is σ = 335813165170560. Its totient is φ = 60296406635520.

The previous prime is 155315516580569. The next prime is 155315516580589. The reversal of 155315516580580 is 85085615513551.

It is a happy number.

It is a super-3 number, since 3×155315516580580³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (155315516580589) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3743333635 + ... + 3743375125.

It is an arithmetic number, because the mean of its divisors is an integer number (3498053803860).

Almost surely, 2^{155315516580580} is an apocalyptic number.

155315516580580 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 155315516580580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167906582585280).

155315516580580 is an abundant number, since it is smaller than the sum of its proper divisors (180497648589980).

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

155315516580580 is a wasteful number, since it uses less digits than its factorization.

155315516580580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54029 (or 54027 counting only the distinct ones).

The product of its (nonzero) digits is 18000000, while the sum is 58.

The spelling of 155315516580580 in words is "one hundred fifty-five trillion, three hundred fifteen billion, five hundred sixteen million, five hundred eighty thousand, five hundred eighty".