812991058377 has 16 divisors (see below), whose sum is σ = 1111606727040. Its totient is φ = 528356259200.

The previous prime is 812991058333. The next prime is 812991058379. The reversal of 812991058377 is 773850199218.

It is a cyclic number.

It is not a de Polignac number, because 812991058377 - 2⁷ = 812991058249 is a prime.

It is a super-2 number, since 2×812991058377² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 812991058377.

It is not an unprimeable number, because it can be changed into a prime (812991058379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21424074 + ... + 21461987.

It is an arithmetic number, because the mean of its divisors is an integer number (69475420440).

Almost surely, 2^812991058377 is an apocalyptic number.

It is an amenable number.

812991058377 is a deficient number, since it is larger than the sum of its proper divisors (298615668663).

812991058377 is a wasteful number, since it uses less digits than its factorization.

812991058377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42886224.

The product of its (nonzero) digits is 7620480, while the sum is 60.

The spelling of 812991058377 in words is "eight hundred twelve billion, nine hundred ninety-one million, fifty-eight thousand, three hundred seventy-seven".