61713378813 has 16 divisors (see below), whose sum is σ = 82403467776. Its totient is φ = 41082819840.

The previous prime is 61713378791. The next prime is 61713378889. The reversal of 61713378813 is 31887331716.

It is not a de Polignac number, because 61713378813 - 2⁵ = 61713378781 is a prime.

It is a super-2 number, since 2×61713378813² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61713378893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6731953 + ... + 6741113.

It is an arithmetic number, because the mean of its divisors is an integer number (5150216736).

Almost surely, 2^61713378813 is an apocalyptic number.

It is an amenable number.

61713378813 is a deficient number, since it is larger than the sum of its proper divisors (20690088963).

61713378813 is a wasteful number, since it uses less digits than its factorization.

61713378813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12164.

The product of its digits is 508032, while the sum is 48.

The spelling of 61713378813 in words is "sixty-one billion, seven hundred thirteen million, three hundred seventy-eight thousand, eight hundred thirteen".