64401277 has 4 divisors (see below), whose sum is σ = 65177280. Its totient is φ = 63625276.

The previous prime is 64401269. The next prime is 64401289. The reversal of 64401277 is 77210446.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64401277 - 2³ = 64401269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64401247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387877 + ... + 388042.

It is an arithmetic number, because the mean of its divisors is an integer number (16294320).

Almost surely, 2^64401277 is an apocalyptic number.

It is an amenable number.

64401277 is a deficient number, since it is larger than the sum of its proper divisors (776003).

64401277 is an equidigital number, since it uses as much as digits as its factorization.

64401277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776002.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 64401277 is about 8025.0406229501. The cubic root of 64401277 is about 400.8342525969.

The spelling of 64401277 in words is "sixty-four million, four hundred one thousand, two hundred seventy-seven".