771771121756 has 12 divisors (see below), whose sum is σ = 1421683645480. Its totient is φ = 365575794480.

The previous prime is 771771121733. The next prime is 771771121819. The reversal of 771771121756 is 657121177177.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5077441515 + ... + 5077441666.

Almost surely, 2^771771121756 is an apocalyptic number.

771771121756 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

771771121756 is a deficient number, since it is larger than the sum of its proper divisors (649912523724).

771771121756 is a wasteful number, since it uses less digits than its factorization.

771771121756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10154883204 (or 10154883202 counting only the distinct ones).

The product of its digits is 1008420, while the sum is 52.

The spelling of 771771121756 in words is "seven hundred seventy-one billion, seven hundred seventy-one million, one hundred twenty-one thousand, seven hundred fifty-six".