64436377 has 2 divisors, whose sum is σ = 64436378. Its totient is φ = 64436376.

The previous prime is 64436327. The next prime is 64436413. The reversal of 64436377 is 77363446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57592921 + 6843456 = 7589^2 + 2616^2 .

It is a cyclic number.

It is not a de Polignac number, because 64436377 - 2¹⁹ = 63912089 is a prime.

It is a super-2 number, since 2×64436377² = 8304093361772258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64436327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32218188 + 32218189.

It is an arithmetic number, because the mean of its divisors is an integer number (32218189).

Almost surely, 2^64436377 is an apocalyptic number.

It is an amenable number.

64436377 is a deficient number, since it is larger than the sum of its proper divisors (1).

64436377 is an equidigital number, since it uses as much as digits as its factorization.

64436377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 40.

The square root of 64436377 is about 8027.2272298721. The cubic root of 64436377 is about 400.9070602993.

The spelling of 64436377 in words is "sixty-four million, four hundred thirty-six thousand, three hundred seventy-seven".