1465985645 has 6 divisors (see below), whose sum is σ = 1759285518. Its totient is φ = 1172720024.

The previous prime is 1465985639. The next prime is 1465985657. The reversal of 1465985645 is 5465895641.

It can be written as a sum of positive squares in only one way, i.e., 1172788516 + 293197129 = 34246^2 + 17123^2 .

It is not a de Polignac number, because 1465985645 - 2²² = 1461791341 is a prime.

It is a super-3 number, since 3×1465985645³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77054 + ... + 94176.

It is an arithmetic number, because the mean of its divisors is an integer number (293214253).

Almost surely, 2^1465985645 is an apocalyptic number.

It is an amenable number.

1465985645 is a deficient number, since it is larger than the sum of its proper divisors (293299873).

1465985645 is an frugal number, since it uses more digits than its factorization.

1465985645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34251 (or 17128 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 53.

The square root of 1465985645 is about 38288.1919787289. The cubic root of 1465985645 is about 1135.9953994247.

The spelling of 1465985645 in words is "one billion, four hundred sixty-five million, nine hundred eighty-five thousand, six hundred forty-five".