61685581283 has 2 divisors, whose sum is σ = 61685581284. Its totient is φ = 61685581282.

The previous prime is 61685581271. The next prime is 61685581339. The reversal of 61685581283 is 38218558616.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61685581283 - 2¹⁰ = 61685580259 is a prime.

It is a super-2 number, since 2×61685581283² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61685581483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30842790641 + 30842790642.

It is an arithmetic number, because the mean of its divisors is an integer number (30842790642).

Almost surely, 2^61685581283 is an apocalyptic number.

61685581283 is a deficient number, since it is larger than the sum of its proper divisors (1).

61685581283 is an equidigital number, since it uses as much as digits as its factorization.

61685581283 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2764800, while the sum is 53.

The spelling of 61685581283 in words is "sixty-one billion, six hundred eighty-five million, five hundred eighty-one thousand, two hundred eighty-three".