1909676777772 has 24 divisors (see below), whose sum is σ = 4456047533056. Its totient is φ = 636539632848.

The previous prime is 1909676777689. The next prime is 1909676777773. The reversal of 1909676777772 is 2777776769091.

It is a junction number, because it is equal to n+sod(n) for n = 1909676777694 and 1909676777703.

It is not an unprimeable number, because it can be changed into a prime (1909676777773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1996348 + ... + 2793699.

Almost surely, 2^{1909676777772} is an apocalyptic number.

1909676777772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1909676777772 is an abundant number, since it is smaller than the sum of its proper divisors (2546370755284).

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

1909676777772 is a wasteful number, since it uses less digits than its factorization.

1909676777772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4823277 (or 4823275 counting only the distinct ones).

The product of its (nonzero) digits is 686128968, while the sum is 75.

The spelling of 1909676777772 in words is "one trillion, nine hundred nine billion, six hundred seventy-six million, seven hundred seventy-seven thousand, seven hundred seventy-two".