1087821615660 has 384 divisors, whose sum is σ = 3424899760128. Its totient is φ = 256176000000.

The previous prime is 1087821615611. The next prime is 1087821615679. The reversal of 1087821615660 is 665161287801.

1087821615660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 916445587 + ... + 916446773.

It is an arithmetic number, because the mean of its divisors is an integer number (8919009792).

Almost surely, 2^{1087821615660} is an apocalyptic number.

1087821615660 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 1087821615660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1712449880064).

1087821615660 is an abundant number, since it is smaller than the sum of its proper divisors (2337078144468).

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

1087821615660 is a wasteful number, since it uses less digits than its factorization.

1087821615660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645 (or 1643 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 1087821615660 in words is "one trillion, eighty-seven billion, eight hundred twenty-one million, six hundred fifteen thousand, six hundred sixty".