61881995313143 has 2 divisors, whose sum is σ = 61881995313144. Its totient is φ = 61881995313142.

The previous prime is 61881995313049. The next prime is 61881995313227. The reversal of 61881995313143 is 34131359918816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61881995313143 - 2²⁸ = 61881726877687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61881995313043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30940997656571 + 30940997656572.

It is an arithmetic number, because the mean of its divisors is an integer number (30940997656572).

Almost surely, 2^{61881995313143} is an apocalyptic number.

61881995313143 is a deficient number, since it is larger than the sum of its proper divisors (1).

61881995313143 is an equidigital number, since it uses as much as digits as its factorization.

61881995313143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16796160, while the sum is 62.

The spelling of 61881995313143 in words is "sixty-one trillion, eight hundred eighty-one billion, nine hundred ninety-five million, three hundred thirteen thousand, one hundred forty-three".