64376257 has 16 divisors (see below), whose sum is σ = 71876160. Its totient is φ = 57164800.

The previous prime is 64376233. The next prime is 64376261. The reversal of 64376257 is 75267346.

It is not a de Polignac number, because 64376257 - 2¹⁹ = 63851969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64376227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182193 + ... + 182545.

It is an arithmetic number, because the mean of its divisors is an integer number (4492260).

Almost surely, 2^64376257 is an apocalyptic number.

It is an amenable number.

64376257 is a deficient number, since it is larger than the sum of its proper divisors (7499903).

64376257 is a wasteful number, since it uses less digits than its factorization.

64376257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704.

The product of its digits is 211680, while the sum is 40.

The square root of 64376257 is about 8023.4816009012. The cubic root of 64376257 is about 400.7823376220.

The spelling of 64376257 in words is "sixty-four million, three hundred seventy-six thousand, two hundred fifty-seven".