80786821457 has 8 divisors (see below), whose sum is σ = 81074639040. Its totient is φ = 80499268080.

The previous prime is 80786821429. The next prime is 80786821481. The reversal of 80786821457 is 75412868708.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80786821457 - 2⁶ = 80786821393 is a prime.

It is a super-2 number, since 2×80786821457² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80786821057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557003 + ... + 686895.

It is an arithmetic number, because the mean of its divisors is an integer number (10134329880).

Almost surely, 2^80786821457 is an apocalyptic number.

It is an amenable number.

80786821457 is a deficient number, since it is larger than the sum of its proper divisors (287817583).

80786821457 is a wasteful number, since it uses less digits than its factorization.

80786821457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132103.

The product of its (nonzero) digits is 6021120, while the sum is 56.

The spelling of 80786821457 in words is "eighty billion, seven hundred eighty-six million, eight hundred twenty-one thousand, four hundred fifty-seven".