81270617023 has 2 divisors, whose sum is σ = 81270617024. Its totient is φ = 81270617022.

The previous prime is 81270616969. The next prime is 81270617101. The reversal of 81270617023 is 32071607218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81270617023 - 2¹³ = 81270608831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81270612023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40635308511 + 40635308512.

It is an arithmetic number, because the mean of its divisors is an integer number (40635308512).

Almost surely, 2^81270617023 is an apocalyptic number.

81270617023 is a deficient number, since it is larger than the sum of its proper divisors (1).

81270617023 is an equidigital number, since it uses as much as digits as its factorization.

81270617023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The spelling of 81270617023 in words is "eighty-one billion, two hundred seventy million, six hundred seventeen thousand, twenty-three".