64541242501513 has 4 divisors (see below), whose sum is σ = 65266425001620. Its totient is φ = 63816060001408.

The previous prime is 64541242501487. The next prime is 64541242501523. The reversal of 64541242501513 is 31510524214546.

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 11514708848889 + 53026533652624 = 3393333^2 + 7281932^2 .

It is a cyclic number.

It is not a de Polignac number, because 64541242501513 - 2⁵ = 64541242501481 is a prime.

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 64541242501513.

It is not an unprimeable number, because it can be changed into a prime (64541242501523) 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, 362591249920 + ... + 362591250097.

It is an arithmetic number, because the mean of its divisors is an integer number (16316606250405).

Almost surely, 2^{64541242501513} is an apocalyptic number.

It is an amenable number.

64541242501513 is a deficient number, since it is larger than the sum of its proper divisors (725182500107).

64541242501513 is an equidigital number, since it uses as much as digits as its factorization.

64541242501513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725182500106.

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 64541242501513 in words is "sixty-four trillion, five hundred forty-one billion, two hundred forty-two million, five hundred one thousand, five hundred thirteen".