64051613 has 4 divisors (see below), whose sum is σ = 65260188. Its totient is φ = 62843040.

The previous prime is 64051607. The next prime is 64051627. The reversal of 64051613 is 31615046.

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 35557369 + 28494244 = 5963^2 + 5338^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64051613 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 (64051643) 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, 604208 + ... + 604313.

It is an arithmetic number, because the mean of its divisors is an integer number (16315047).

Almost surely, 2^64051613 is an apocalyptic number.

It is an amenable number.

64051613 is a deficient number, since it is larger than the sum of its proper divisors (1208575).

64051613 is a wasteful number, since it uses less digits than its factorization.

64051613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208574.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 64051613 is about 8003.2251623955. The cubic root of 64051613 is about 400.1074981911.

Adding to 64051613 its reverse (31615046), we get a palindrome (95666659).

The spelling of 64051613 in words is "sixty-four million, fifty-one thousand, six hundred thirteen".