61313223812 has 6 divisors (see below), whose sum is σ = 107298141678. Its totient is φ = 30656611904.

The previous prime is 61313223773. The next prime is 61313223817. The reversal of 61313223812 is 21832231316.

It can be written as a sum of positive squares in only one way, i.e., 40327065856 + 20986157956 = 200816^2 + 144866^2 .

It is a super-2 number, since 2×61313223812² (a number of 22 digits) contains 22 as substring.

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 as a sum of consecutive naturals, namely, 7664152973 + ... + 7664152980.

It is an arithmetic number, because the mean of its divisors is an integer number (17883023613).

Almost surely, 2^61313223812 is an apocalyptic number.

It is an amenable number.

61313223812 is a deficient number, since it is larger than the sum of its proper divisors (45984917866).

61313223812 is a wasteful number, since it uses less digits than its factorization.

61313223812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15328305957 (or 15328305955 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The spelling of 61313223812 in words is "sixty-one billion, three hundred thirteen million, two hundred twenty-three thousand, eight hundred twelve".