81233796751 has 2 divisors, whose sum is σ = 81233796752. Its totient is φ = 81233796750.

The previous prime is 81233796697. The next prime is 81233796779. The reversal of 81233796751 is 15769733218.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81233796751 - 2¹⁵ = 81233763983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81233794751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40616898375 + 40616898376.

It is an arithmetic number, because the mean of its divisors is an integer number (40616898376).

Almost surely, 2^81233796751 is an apocalyptic number.

81233796751 is a deficient number, since it is larger than the sum of its proper divisors (1).

81233796751 is an equidigital number, since it uses as much as digits as its factorization.

81233796751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 52.

The spelling of 81233796751 in words is "eighty-one billion, two hundred thirty-three million, seven hundred ninety-six thousand, seven hundred fifty-one".