776245867920 has 480 divisors, whose sum is σ = 2884813276800. Its totient is φ = 193411141632.

The previous prime is 776245867919. The next prime is 776245867951. The reversal of 776245867920 is 29768542677.

776245867920 is a `hidden beast` number, since 7 + 7 + 6 + 24 + 586 + 7 + 9 + 20 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26948886 + ... + 26977674.

It is an arithmetic number, because the mean of its divisors is an integer number (6010027660).

Almost surely, 2^776245867920 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 776245867920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1442406638400).

776245867920 is an abundant number, since it is smaller than the sum of its proper divisors (2108567408880).

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

776245867920 is a wasteful number, since it uses less digits than its factorization.

776245867920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28909 (or 28891 counting only the distinct ones).

The product of its (nonzero) digits is 71124480, while the sum is 63.

The spelling of 776245867920 in words is "seven hundred seventy-six billion, two hundred forty-five million, eight hundred sixty-seven thousand, nine hundred twenty".