80897845493 has 2 divisors, whose sum is σ = 80897845494. Its totient is φ = 80897845492.

The previous prime is 80897845487. The next prime is 80897845531. The reversal of 80897845493 is 39454879808.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78591636964 + 2306208529 = 280342^2 + 48023^2 .

It is a cyclic number.

It is not a de Polignac number, because 80897845493 - 2⁶ = 80897845429 is a prime.

It is a super-2 number, since 2×80897845493² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80897865493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40448922746 + 40448922747.

It is an arithmetic number, because the mean of its divisors is an integer number (40448922747).

Almost surely, 2^80897845493 is an apocalyptic number.

It is an amenable number.

80897845493 is a deficient number, since it is larger than the sum of its proper divisors (1).

80897845493 is an equidigital number, since it uses as much as digits as its factorization.

80897845493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69672960, while the sum is 65.

The spelling of 80897845493 in words is "eighty billion, eight hundred ninety-seven million, eight hundred forty-five thousand, four hundred ninety-three".