77790783771 has 24 divisors (see below), whose sum is σ = 113695449504. Its totient is φ = 51247848960.

The previous prime is 77790783713. The next prime is 77790783869. The reversal of 77790783771 is 17738709777.

It is not a de Polignac number, because 77790783771 - 2¹⁴ = 77790767387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77790783699 and 77790783708.

It is not an unprimeable number, because it can be changed into a prime (77790783071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 509650 + ... + 644456.

It is an arithmetic number, because the mean of its divisors is an integer number (4737310396).

Almost surely, 2^77790783771 is an apocalyptic number.

77790783771 is a deficient number, since it is larger than the sum of its proper divisors (35904665733).

77790783771 is a wasteful number, since it uses less digits than its factorization.

77790783771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135571 (or 135568 counting only the distinct ones).

The product of its (nonzero) digits is 25412184, while the sum is 63.

The spelling of 77790783771 in words is "seventy-seven billion, seven hundred ninety million, seven hundred eighty-three thousand, seven hundred seventy-one".