61313223813 has 32 divisors (see below), whose sum is σ = 85767690240. Its totient is φ = 38910735360.

The previous prime is 61313223773. The next prime is 61313223817. The reversal of 61313223813 is 31832231316.

It is not a de Polignac number, because 61313223813 - 2²⁴ = 61296446597 is a prime.

It is a super-2 number, since 2×61313223813² (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 (61313223817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1861395 + ... + 1894047.

It is an arithmetic number, because the mean of its divisors is an integer number (2680240320).

Almost surely, 2^61313223813 is an apocalyptic number.

It is an amenable number.

61313223813 is a deficient number, since it is larger than the sum of its proper divisors (24454466427).

61313223813 is a wasteful number, since it uses less digits than its factorization.

61313223813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32989.

The product of its digits is 15552, while the sum is 33.

The spelling of 61313223813 in words is "sixty-one billion, three hundred thirteen million, two hundred twenty-three thousand, eight hundred thirteen".