61313223773 has 2 divisors, whose sum is σ = 61313223774. Its totient is φ = 61313223772.

The previous prime is 61313223743. The next prime is 61313223817. The reversal of 61313223773 is 37732231316.

61313223773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57851313529 + 3461910244 = 240523^2 + 58838^2 .

It is a cyclic number.

It is not a de Polignac number, because 61313223773 - 2¹⁸ = 61312961629 is a prime.

It is a super-2 number, since 2×61313223773² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61313223743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30656611886 + 30656611887.

It is an arithmetic number, because the mean of its divisors is an integer number (30656611887).

Almost surely, 2^61313223773 is an apocalyptic number.

It is an amenable number.

61313223773 is a deficient number, since it is larger than the sum of its proper divisors (1).

61313223773 is an equidigital number, since it uses as much as digits as its factorization.

61313223773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 38.

The spelling of 61313223773 in words is "sixty-one billion, three hundred thirteen million, two hundred twenty-three thousand, seven hundred seventy-three".