65481572243 has 2 divisors, whose sum is σ = 65481572244. Its totient is φ = 65481572242.

The previous prime is 65481572201. The next prime is 65481572257. The reversal of 65481572243 is 34227518456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65481572243 - 2¹² = 65481568147 is a prime.

It is not a weakly prime, because it can be changed into another prime (65481572293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32740786121 + 32740786122.

It is an arithmetic number, because the mean of its divisors is an integer number (32740786122).

Almost surely, 2^65481572243 is an apocalyptic number.

65481572243 is a deficient number, since it is larger than the sum of its proper divisors (1).

65481572243 is an equidigital number, since it uses as much as digits as its factorization.

65481572243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1612800, while the sum is 47.

The spelling of 65481572243 in words is "sixty-five billion, four hundred eighty-one million, five hundred seventy-two thousand, two hundred forty-three".