64269945 has 48 divisors (see below), whose sum is σ = 122063760. Its totient is φ = 31137792.

The previous prime is 64269937. The next prime is 64269949. The reversal of 64269945 is 54996246.

It can be written as a sum of positive squares in 8 ways, for example, as 1115136 + 63154809 = 1056^2 + 7947^2 .

It is not a de Polignac number, because 64269945 - 2³ = 64269937 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 64269945.

It is not an unprimeable number, because it can be changed into a prime (64269949) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20737 + ... + 23633.

It is an arithmetic number, because the mean of its divisors is an integer number (2542995).

Almost surely, 2^64269945 is an apocalyptic number.

It is an amenable number.

64269945 is a deficient number, since it is larger than the sum of its proper divisors (57793815).

64269945 is a wasteful number, since it uses less digits than its factorization.

64269945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954 (or 2951 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 64269945 is about 8016.8538093195. The cubic root of 64269945 is about 400.5615965709.

The spelling of 64269945 in words is "sixty-four million, two hundred sixty-nine thousand, nine hundred forty-five".