812977101889 has 8 divisors (see below), whose sum is σ = 824773055360. Its totient is φ = 801218776176.

The previous prime is 812977101869. The next prime is 812977101971. The reversal of 812977101889 is 988101779218.

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 812977101889 - 2²⁹ = 812440230977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812977101809) 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, 9363414 + ... + 9449839.

It is an arithmetic number, because the mean of its divisors is an integer number (103096631920).

Almost surely, 2^812977101889 is an apocalyptic number.

It is an amenable number.

812977101889 is a deficient number, since it is larger than the sum of its proper divisors (11795953471).

812977101889 is a wasteful number, since it uses less digits than its factorization.

812977101889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18813879.

The product of its (nonzero) digits is 4064256, while the sum is 61.

The spelling of 812977101889 in words is "eight hundred twelve billion, nine hundred seventy-seven million, one hundred one thousand, eight hundred eighty-nine".