64431045 has 40 divisors (see below), whose sum is σ = 132004224. Its totient is φ = 29452896.

The previous prime is 64431043. The next prime is 64431053. The reversal of 64431045 is 54013446.

64431045 is a `hidden beast` number, since 644 + 3 + 10 + 4 + 5 = 666.

It is not a de Polignac number, because 64431045 - 2¹ = 64431043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64431043) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8529 + ... + 14198.

Almost surely, 2^64431045 is an apocalyptic number.

It is an amenable number.

64431045 is an abundant number, since it is smaller than the sum of its proper divisors (67573179).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64431045 is a wasteful number, since it uses less digits than its factorization.

64431045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22751 (or 22742 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 64431045 is about 8026.8951033385. The cubic root of 64431045 is about 400.8960018697.

The spelling of 64431045 in words is "sixty-four million, four hundred thirty-one thousand, forty-five".