64148513 has 18 divisors (see below), whose sum is σ = 76375782. Its totient is φ = 53813760.

The previous prime is 64148509. The next prime is 64148527. The reversal of 64148513 is 31584146.

It can be written as a sum of positive squares in 3 ways, for example, as 8690704 + 55457809 = 2948^2 + 7447^2 .

It is not a de Polignac number, because 64148513 - 2² = 64148509 is a prime.

It is a super-2 number, since 2×64148513² = 8230063440222338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64148513.

It is not an unprimeable number, because it can be changed into a prime (64148543) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18881 + ... + 22017.

It is an arithmetic number, because the mean of its divisors is an integer number (4243099).

Almost surely, 2^64148513 is an apocalyptic number.

It is an amenable number.

64148513 is a deficient number, since it is larger than the sum of its proper divisors (12227269).

64148513 is a wasteful number, since it uses less digits than its factorization.

64148513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3185 (or 3161 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 64148513 is about 8009.2766839459. The cubic root of 64148513 is about 400.3091630673.

The spelling of 64148513 in words is "sixty-four million, one hundred forty-eight thousand, five hundred thirteen".