81774004583 has 2 divisors, whose sum is σ = 81774004584. Its totient is φ = 81774004582.

The previous prime is 81774004519. The next prime is 81774004643. The reversal of 81774004583 is 38540047718.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81774004583 - 2⁶ = 81774004519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81774004483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40887002291 + 40887002292.

It is an arithmetic number, because the mean of its divisors is an integer number (40887002292).

Almost surely, 2^81774004583 is an apocalyptic number.

81774004583 is a deficient number, since it is larger than the sum of its proper divisors (1).

81774004583 is an equidigital number, since it uses as much as digits as its factorization.

81774004583 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 81774004583 in words is "eighty-one billion, seven hundred seventy-four million, four thousand, five hundred eighty-three".