677821306031 has 4 divisors (see below), whose sum is σ = 677839482000. Its totient is φ = 677803130064.

The previous prime is 677821305929. The next prime is 677821306079. The reversal of 677821306031 is 130603128776.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 677821306031 - 2¹⁴ = 677821289647 is a prime.

It is a super-2 number, since 2×677821306031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677821306531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9031931 + ... + 9106668.

It is an arithmetic number, because the mean of its divisors is an integer number (169459870500).

Almost surely, 2^677821306031 is an apocalyptic number.

677821306031 is a deficient number, since it is larger than the sum of its proper divisors (18175969).

677821306031 is a wasteful number, since it uses less digits than its factorization.

677821306031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18175968.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 677821306031 in words is "six hundred seventy-seven billion, eight hundred twenty-one million, three hundred six thousand, thirty-one".