812677961641 has 32 divisors (see below), whose sum is σ = 1014108076800. Its totient is φ = 634072541184.

The previous prime is 812677961629. The next prime is 812677961647. The reversal of 812677961641 is 146169776218.

It is a cyclic number.

It is not a de Polignac number, because 812677961641 - 2¹⁹ = 812677437353 is a prime.

It is a super-3 number, since 3×812677961641³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (812677961647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59534385 + ... + 59548033.

It is an arithmetic number, because the mean of its divisors is an integer number (31690877400).

Almost surely, 2^812677961641 is an apocalyptic number.

It is an amenable number.

812677961641 is a deficient number, since it is larger than the sum of its proper divisors (201430115159).

812677961641 is a wasteful number, since it uses less digits than its factorization.

812677961641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22705.

The product of its digits is 6096384, while the sum is 58.

The spelling of 812677961641 in words is "eight hundred twelve billion, six hundred seventy-seven million, nine hundred sixty-one thousand, six hundred forty-one".