1515055861660 has 96 divisors (see below), whose sum is σ = 3485265138432. Its totient is φ = 548645368320.

The previous prime is 1515055861643. The next prime is 1515055861673. The reversal of 1515055861660 is 661685505151.

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, 80565819 + ... + 80584621.

It is an arithmetic number, because the mean of its divisors is an integer number (36304845192).

Almost surely, 2^{1515055861660} is an apocalyptic number.

1515055861660 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 1515055861660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1742632569216).

1515055861660 is an abundant number, since it is smaller than the sum of its proper divisors (1970209276772).

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

1515055861660 is a wasteful number, since it uses less digits than its factorization.

1515055861660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20323 (or 20321 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 49.

The spelling of 1515055861660 in words is "one trillion, five hundred fifteen billion, fifty-five million, eight hundred sixty-one thousand, six hundred sixty".