776717616 has 80 divisors (see below), whose sum is σ = 2070697824. Its totient is φ = 250693632.

The previous prime is 776717611. The next prime is 776717633. The reversal of 776717616 is 616717677.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (776717611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412870 + ... + 414746.

Almost surely, 2^776717616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 776717616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1035348912).

776717616 is an abundant number, since it is smaller than the sum of its proper divisors (1293980208).

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

776717616 is a wasteful number, since it uses less digits than its factorization.

776717616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158 (or 2152 counting only the distinct ones).

The product of its digits is 518616, while the sum is 48.

The square root of 776717616 is about 27869.6540344512. The cubic root of 776717616 is about 919.2233584252.

The spelling of 776717616 in words is "seven hundred seventy-six million, seven hundred seventeen thousand, six hundred sixteen".