64242577 has 12 divisors (see below), whose sum is σ = 75959796. Its totient is φ = 54159840.

The previous prime is 64242533. The next prime is 64242587. The reversal of 64242577 is 77524246.

It can be written as a sum of positive squares in 2 ways, for example, as 3651921 + 60590656 = 1911^2 + 7784^2 .

It is not a de Polignac number, because 64242577 - 2¹¹ = 64240529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64242517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7758 + ... + 13735.

It is an arithmetic number, because the mean of its divisors is an integer number (6329983).

Almost surely, 2^64242577 is an apocalyptic number.

It is an amenable number.

64242577 is a deficient number, since it is larger than the sum of its proper divisors (11717219).

64242577 is a wasteful number, since it uses less digits than its factorization.

64242577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21568 (or 21561 counting only the distinct ones).

The product of its digits is 94080, while the sum is 37.

The square root of 64242577 is about 8015.1467235479. The cubic root of 64242577 is about 400.5047315972.

The spelling of 64242577 in words is "sixty-four million, two hundred forty-two thousand, five hundred seventy-seven".