777921048906 has 16 divisors (see below), whose sum is σ = 1560750120864. Its totient is φ = 258489012464.

The previous prime is 777921048901. The next prime is 777921048907. The reversal of 777921048906 is 609840129777.

It is a super-2 number, since 2×777921048906² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 777921048906.

It is not an unprimeable number, because it can be changed into a prime (777921048901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204498900 + ... + 204502703.

It is an arithmetic number, because the mean of its divisors is an integer number (97546882554).

Almost surely, 2^777921048906 is an apocalyptic number.

777921048906 is an abundant number, since it is smaller than the sum of its proper divisors (782829071958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

777921048906 is a wasteful number, since it uses less digits than its factorization.

777921048906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409001925.

The product of its (nonzero) digits is 10668672, while the sum is 60.

The spelling of 777921048906 in words is "seven hundred seventy-seven billion, nine hundred twenty-one million, forty-eight thousand, nine hundred six".