1161151520 has 48 divisors (see below), whose sum is σ = 2758613760. Its totient is φ = 461854464.

The previous prime is 1161151517. The next prime is 1161151553. The reversal of 1161151520 is 251511611.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8369 + ... + 48911.

It is an arithmetic number, because the mean of its divisors is an integer number (57471120).

Almost surely, 2^1161151520 is an apocalyptic number.

1161151520 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 1161151520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1379306880).

1161151520 is an abundant number, since it is smaller than the sum of its proper divisors (1597462240).

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

1161151520 is a wasteful number, since it uses less digits than its factorization.

1161151520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40737 (or 40729 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 23.

The square root of 1161151520 is about 34075.6734342845. The cubic root of 1161151520 is about 1051.0651383385.

The spelling of 1161151520 in words is "one billion, one hundred sixty-one million, one hundred fifty-one thousand, five hundred twenty".