61367812413 has 4 divisors (see below), whose sum is σ = 81823749888. Its totient is φ = 40911874940.

The previous prime is 61367812393. The next prime is 61367812421. The reversal of 61367812413 is 31421876316.

It is a happy number.

61367812413 is digitally balanced in base 2, 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, 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 61367812413 - 2¹³ = 61367804221 is a prime.

It is a super-3 number, since 3×61367812413³ (a number of 33 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61367812453) 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, 10227968733 + ... + 10227968738.

It is an arithmetic number, because the mean of its divisors is an integer number (20455937472).

Almost surely, 2^61367812413 is an apocalyptic number.

It is an amenable number.

61367812413 is a deficient number, since it is larger than the sum of its proper divisors (20455937475).

61367812413 is a wasteful number, since it uses less digits than its factorization.

61367812413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20455937474.

The product of its digits is 145152, while the sum is 42.

The spelling of 61367812413 in words is "sixty-one billion, three hundred sixty-seven million, eight hundred twelve thousand, four hundred thirteen".