775783680 has 576 divisors, whose sum is σ = 3139584000. Its totient is φ = 162570240.

The previous prime is 775783663. The next prime is 775783681. The reversal of 775783680 is 86387577.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775783681) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25025265 + ... + 25025295.

Almost surely, 2^775783680 is an apocalyptic number.

775783680 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 775783680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1569792000).

775783680 is an abundant number, since it is smaller than the sum of its proper divisors (2363800320).

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

775783680 is a wasteful number, since it uses less digits than its factorization.

775783680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 51.

The square root of 775783680 is about 27852.8935660193. The cubic root of 775783680 is about 918.8547817002.

The spelling of 775783680 in words is "seven hundred seventy-five million, seven hundred eighty-three thousand, six hundred eighty".