1156261664 has 96 divisors (see below), whose sum is σ = 2523902976. Its totient is φ = 519086080.

The previous prime is 1156261637. The next prime is 1156261709. The reversal of 1156261664 is 4661626511.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1047737 + ... + 1048839.

It is an arithmetic number, because the mean of its divisors is an integer number (26290656).

Almost surely, 2^1156261664 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 1156261664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1261951488).

1156261664 is an abundant number, since it is smaller than the sum of its proper divisors (1367641312).

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

1156261664 is a wasteful number, since it uses less digits than its factorization.

1156261664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218 (or 1210 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 1156261664 is about 34003.8477822731. The cubic root of 1156261664 is about 1049.5876427661.

The spelling of 1156261664 in words is "one billion, one hundred fifty-six million, two hundred sixty-one thousand, six hundred sixty-four".