64156465 has 4 divisors (see below), whose sum is σ = 76987764. Its totient is φ = 51325168.

The previous prime is 64156459. The next prime is 64156471. The reversal of 64156465 is 56465146.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (64156459) and next prime (64156471).

It can be written as a sum of positive squares in 2 ways, for example, as 9144576 + 55011889 = 3024^2 + 7417^2 .

It is a cyclic number.

It is not a de Polignac number, because 64156465 - 2¹⁷ = 64025393 is a prime.

It is a Duffinian number.

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, 6415642 + ... + 6415651.

It is an arithmetic number, because the mean of its divisors is an integer number (19246941).

Almost surely, 2^64156465 is an apocalyptic number.

It is an amenable number.

64156465 is a deficient number, since it is larger than the sum of its proper divisors (12831299).

64156465 is a wasteful number, since it uses less digits than its factorization.

64156465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12831298.

The product of its digits is 86400, while the sum is 37.

The square root of 64156465 is about 8009.7730929159. The cubic root of 64156465 is about 400.3257034711.

It can be divided in two parts, 6415 and 6465, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 64156465 in words is "sixty-four million, one hundred fifty-six thousand, four hundred sixty-five".