1165501661152 has 48 divisors (see below), whose sum is σ = 2360163893472. Its totient is φ = 566142635520.

The previous prime is 1165501661089. The next prime is 1165501661161. The reversal of 1165501661152 is 2511661055611.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38013 + ... + 1527235.

It is an arithmetic number, because the mean of its divisors is an integer number (49170081114).

Almost surely, 2^{1165501661152} 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 1165501661152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1180081946736).

1165501661152 is an abundant number, since it is smaller than the sum of its proper divisors (1194662232320).

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

1165501661152 is a wasteful number, since it uses less digits than its factorization.

1165501661152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489931 (or 1489923 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 40.

The spelling of 1165501661152 in words is "one trillion, one hundred sixty-five billion, five hundred one million, six hundred sixty-one thousand, one hundred fifty-two".