866144980454 has 16 divisors (see below), whose sum is σ = 1405788362160. Its totient is φ = 397864625760.

The previous prime is 866144980447. The next prime is 866144980471. The reversal of 866144980454 is 454089441668.

866144980454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×866144980454² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 866144980393 and 866144980402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78935909 + ... + 78946880.

It is an arithmetic number, because the mean of its divisors is an integer number (87861772635).

Almost surely, 2^866144980454 is an apocalyptic number.

866144980454 is a deficient number, since it is larger than the sum of its proper divisors (539643381706).

866144980454 is a wasteful number, since it uses less digits than its factorization.

866144980454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157883015.

The product of its (nonzero) digits is 26542080, while the sum is 59.

The spelling of 866144980454 in words is "eight hundred sixty-six billion, one hundred forty-four million, nine hundred eighty thousand, four hundred fifty-four".