61523166871 has 2 divisors, whose sum is σ = 61523166872. Its totient is φ = 61523166870.

The previous prime is 61523166863. The next prime is 61523166911. The reversal of 61523166871 is 17866132516.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61523166871 - 2³ = 61523166863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61523166851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30761583435 + 30761583436.

It is an arithmetic number, because the mean of its divisors is an integer number (30761583436).

Almost surely, 2^61523166871 is an apocalyptic number.

61523166871 is a deficient number, since it is larger than the sum of its proper divisors (1).

61523166871 is an equidigital number, since it uses as much as digits as its factorization.

61523166871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The spelling of 61523166871 in words is "sixty-one billion, five hundred twenty-three million, one hundred sixty-six thousand, eight hundred seventy-one".