8021081378697 has 32 divisors (see below), whose sum is σ = 11390625699840. Its totient is φ = 5010155736960.

The previous prime is 8021081378683. The next prime is 8021081378729. The reversal of 8021081378697 is 7968731801208.

It is not a de Polignac number, because 8021081378697 - 2¹⁵ = 8021081345929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8021081378697.

It is not an unprimeable number, because it can be changed into a prime (8021081378617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5446429 + ... + 6760602.

It is an arithmetic number, because the mean of its divisors is an integer number (355957053120).

Almost surely, 2^{8021081378697} is an apocalyptic number.

It is an amenable number.

8021081378697 is a deficient number, since it is larger than the sum of its proper divisors (3369544321143).

8021081378697 is a wasteful number, since it uses less digits than its factorization.

8021081378697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12207253.

The product of its (nonzero) digits is 8128512, while the sum is 60.

The spelling of 8021081378697 in words is "eight trillion, twenty-one billion, eighty-one million, three hundred seventy-eight thousand, six hundred ninety-seven".