64491457367 has 4 divisors (see below), whose sum is σ = 64494030840. Its totient is φ = 64488883896.

The previous prime is 64491457339. The next prime is 64491457369. The reversal of 64491457367 is 76375419446.

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

It is a cyclic number.

It is not a de Polignac number, because 64491457367 - 2¹⁴ = 64491440983 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 (64491457369) 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, 1248773 + ... + 1299390.

It is an arithmetic number, because the mean of its divisors is an integer number (16123507710).

Almost surely, 2^64491457367 is an apocalyptic number.

64491457367 is a deficient number, since it is larger than the sum of its proper divisors (2573473).

64491457367 is a wasteful number, since it uses less digits than its factorization.

64491457367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573472.

The product of its digits is 15240960, while the sum is 56.

The spelling of 64491457367 in words is "sixty-four billion, four hundred ninety-one million, four hundred fifty-seven thousand, three hundred sixty-seven".