64477613 has 4 divisors (see below), whose sum is σ = 66557568. Its totient is φ = 62397660.

The previous prime is 64477607. The next prime is 64477631. The reversal of 64477613 is 31677446.

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 64477613 - 2¹⁰ = 64476589 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 (64477663) 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, 1039931 + ... + 1039992.

It is an arithmetic number, because the mean of its divisors is an integer number (16639392).

Almost surely, 2^64477613 is an apocalyptic number.

It is an amenable number.

64477613 is a deficient number, since it is larger than the sum of its proper divisors (2079955).

64477613 is a wasteful number, since it uses less digits than its factorization.

64477613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079954.

The product of its digits is 84672, while the sum is 38.

The square root of 64477613 is about 8029.7953274041. The cubic root of 64477613 is about 400.9925620973.

The spelling of 64477613 in words is "sixty-four million, four hundred seventy-seven thousand, six hundred thirteen".