613875049436881 has 2 divisors, whose sum is σ = 613875049436882. Its totient is φ = 613875049436880.

The previous prime is 613875049436821. The next prime is 613875049436897. The reversal of 613875049436881 is 188634940578316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437136769889856 + 176738279547025 = 20907816^2 + 13294295^2 .

It is a cyclic number.

It is not a de Polignac number, because 613875049436881 - 2⁴¹ = 611676026181329 is a prime.

It is a super-2 number, since 2×613875049436881² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (613875049436821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306937524718440 + 306937524718441.

It is an arithmetic number, because the mean of its divisors is an integer number (306937524718441).

Almost surely, 2^{613875049436881} is an apocalyptic number.

It is an amenable number.

613875049436881 is a deficient number, since it is larger than the sum of its proper divisors (1).

613875049436881 is an equidigital number, since it uses as much as digits as its factorization.

613875049436881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 836075520, while the sum is 73.

The spelling of 613875049436881 in words is "six hundred thirteen trillion, eight hundred seventy-five billion, forty-nine million, four hundred thirty-six thousand, eight hundred eighty-one".