1056774677391 has 12 divisors (see below), whose sum is σ = 1542188934832. Its totient is φ = 697253394816.

The previous prime is 1056774677353. The next prime is 1056774677411. The reversal of 1056774677391 is 1937764776501.

1056774677391 is a `hidden beast` number, since 1 + 0 + 567 + 7 + 4 + 67 + 7 + 3 + 9 + 1 = 666.

It is not a de Polignac number, because 1056774677391 - 2⁷ = 1056774677263 is a prime.

It is a super-2 number, since 2×1056774677391² (a number of 25 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 (1056734677391) 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 11 ways as a sum of consecutive naturals, for example, 605253811 + ... + 605255556.

Almost surely, 2^{1056774677391} is an apocalyptic number.

1056774677391 is a deficient number, since it is larger than the sum of its proper divisors (485414257441).

1056774677391 is a wasteful number, since it uses less digits than its factorization.

1056774677391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210509470 (or 1210509467 counting only the distinct ones).

The product of its (nonzero) digits is 46675440, while the sum is 63.

The spelling of 1056774677391 in words is "one trillion, fifty-six billion, seven hundred seventy-four million, six hundred seventy-seven thousand, three hundred ninety-one".