1145665264 has 40 divisors (see below), whose sum is σ = 2312851968. Its totient is φ = 549147840.

The previous prime is 1145665253. The next prime is 1145665291. The reversal of 1145665264 is 4625665411.

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, 42279 + ... + 63865.

Almost surely, 2^1145665264 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 1145665264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1156425984).

1145665264 is an abundant number, since it is smaller than the sum of its proper divisors (1167186704).

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

1145665264 is a wasteful number, since it uses less digits than its factorization.

1145665264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21733 (or 21727 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The square root of 1145665264 is about 33847.6773796962. The cubic root of 1145665264 is about 1046.3715312311.

The spelling of 1145665264 in words is "one billion, one hundred forty-five million, six hundred sixty-five thousand, two hundred sixty-four".