6361521013 has 4 divisors (see below), whose sum is σ = 6385170060. Its totient is φ = 6337871968.

The previous prime is 6361520993. The next prime is 6361521071. The reversal of 6361521013 is 3101251636.

6361521013 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 1209439729 + 5152081284 = 34777^2 + 71778^2 .

It is a cyclic number.

It is not a de Polignac number, because 6361521013 - 2²⁵ = 6327966581 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 (6361521083) 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, 11824120 + ... + 11824657.

It is an arithmetic number, because the mean of its divisors is an integer number (1596292515).

Almost surely, 2^6361521013 is an apocalyptic number.

It is an amenable number.

6361521013 is a deficient number, since it is larger than the sum of its proper divisors (23649047).

6361521013 is a wasteful number, since it uses less digits than its factorization.

6361521013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23649046.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 6361521013 is about 79759.1437579416. The cubic root of 6361521013 is about 1852.9071422195.

Adding to 6361521013 its reverse (3101251636), we get a palindrome (9462772649).

The spelling of 6361521013 in words is "six billion, three hundred sixty-one million, five hundred twenty-one thousand, thirteen".