778132971682 has 32 divisors (see below), whose sum is σ = 1406826797184. Its totient is φ = 318417580800.

The previous prime is 778132971661. The next prime is 778132971683. The reversal of 778132971682 is 286179231877.

It is a self number, because there is not a number n which added to its sum of digits gives 778132971682.

It is not an unprimeable number, because it can be changed into a prime (778132971683) 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, 45221169 + ... + 45238372.

It is an arithmetic number, because the mean of its divisors is an integer number (43963337412).

Almost surely, 2^778132971682 is an apocalyptic number.

778132971682 is a deficient number, since it is larger than the sum of its proper divisors (628693825502).

778132971682 is a wasteful number, since it uses less digits than its factorization.

778132971682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90459594.

The product of its digits is 14224896, while the sum is 61.

The spelling of 778132971682 in words is "seven hundred seventy-eight billion, one hundred thirty-two million, nine hundred seventy-one thousand, six hundred eighty-two".