64767361 has 4 divisors (see below), whose sum is σ = 65408724. Its totient is φ = 64126000.

The previous prime is 64767349. The next prime is 64767377. The reversal of 64767361 is 16376746.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60357361 + 4410000 = 7769^2 + 2100^2 .

It is a cyclic number.

It is not a de Polignac number, because 64767361 - 2⁷ = 64767233 is a prime.

It is a super-2 number, since 2×64767361² = 8389622101808642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64717361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320530 + ... + 320731.

It is an arithmetic number, because the mean of its divisors is an integer number (16352181).

Almost surely, 2^64767361 is an apocalyptic number.

It is an amenable number.

64767361 is a deficient number, since it is larger than the sum of its proper divisors (641363).

64767361 is a wasteful number, since it uses less digits than its factorization.

64767361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641362.

The product of its digits is 127008, while the sum is 40.

The square root of 64767361 is about 8047.8171574657. The cubic root of 64767361 is about 401.5923216186.

The spelling of 64767361 in words is "sixty-four million, seven hundred sixty-seven thousand, three hundred sixty-one".