775693136640 has 576 divisors, whose sum is σ = 2646316108800. Its totient is φ = 193093632000.

The previous prime is 775693136623. The next prime is 775693136689. The reversal of 775693136640 is 46631396577.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1994069566 + ... + 1994069954.

It is an arithmetic number, because the mean of its divisors is an integer number (4594298800).

Almost surely, 2^775693136640 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 775693136640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1323158054400).

775693136640 is an abundant number, since it is smaller than the sum of its proper divisors (1870622972160).

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

775693136640 is a wasteful number, since it uses less digits than its factorization.

775693136640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 17146080, while the sum is 57.

The spelling of 775693136640 in words is "seven hundred seventy-five billion, six hundred ninety-three million, one hundred thirty-six thousand, six hundred forty".