1357665165 has 32 divisors (see below), whose sum is σ = 2444198400. Its totient is φ = 714916800.

The previous prime is 1357665163. The next prime is 1357665167. The reversal of 1357665165 is 5615667531.

1357665165 is a `hidden beast` number, since 1 + 3 + 576 + 65 + 16 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1357665163) and next prime (1357665167).

It is not a de Polignac number, because 1357665165 - 2¹ = 1357665163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1357665165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1357665163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52986 + ... + 74315.

It is an arithmetic number, because the mean of its divisors is an integer number (76381200).

Almost surely, 2^1357665165 is an apocalyptic number.

1357665165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1357665165 is a deficient number, since it is larger than the sum of its proper divisors (1086533235).

1357665165 is a wasteful number, since it uses less digits than its factorization.

1357665165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127394 (or 127388 counting only the distinct ones).

The product of its digits is 567000, while the sum is 45.

The square root of 1357665165 is about 36846.5081792020. The cubic root of 1357665165 is about 1107.2972593501.

The spelling of 1357665165 in words is "one billion, three hundred fifty-seven million, six hundred sixty-five thousand, one hundred sixty-five".