1611331264 has 28 divisors (see below), whose sum is σ = 3385575144. Its totient is φ = 758273024.

The previous prime is 1611331223. The next prime is 1611331277. The reversal of 1611331264 is 4621331161.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739414 + ... + 741589.

It is an arithmetic number, because the mean of its divisors is an integer number (120913398).

Almost surely, 2^1611331264 is an apocalyptic number.

It is an amenable number.

1611331264 is an abundant number, since it is smaller than the sum of its proper divisors (1774243880).

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

1611331264 is a wasteful number, since it uses less digits than its factorization.

1611331264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481032 (or 1481022 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 1611331264 is about 40141.3909076405. The cubic root of 1611331264 is about 1172.3616708890.

The spelling of 1611331264 in words is "one billion, six hundred eleven million, three hundred thirty-one thousand, two hundred sixty-four".