1465640505 has 24 divisors (see below), whose sum is σ = 2903364672. Its totient is φ = 670006944.

The previous prime is 1465640503. The next prime is 1465640521. The reversal of 1465640505 is 5050465641.

1465640505 is a `hidden beast` number, since 1 + 4 + 6 + 5 + 640 + 5 + 0 + 5 = 666.

It is not a de Polignac number, because 1465640505 - 2¹ = 1465640503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1465640505.

It is not an unprimeable number, because it can be changed into a prime (1465640503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2326099 + ... + 2326728.

It is an arithmetic number, because the mean of its divisors is an integer number (120973528).

Almost surely, 2^1465640505 is an apocalyptic number.

1465640505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1465640505 is a deficient number, since it is larger than the sum of its proper divisors (1437724167).

1465640505 is a wasteful number, since it uses less digits than its factorization.

1465640505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4652845 (or 4652842 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 1465640505 is about 38283.6845797266. The cubic root of 1465640505 is about 1135.9062425204.

The spelling of 1465640505 in words is "one billion, four hundred sixty-five million, six hundred forty thousand, five hundred five".