781690219050 has 48 divisors (see below), whose sum is σ = 2087714190240. Its totient is φ = 192416053440.

The previous prime is 781690219043. The next prime is 781690219087. The reversal of 781690219050 is 50912096187.

It is a super-2 number, since 2×781690219050² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200431440 + ... + 200435339.

It is an arithmetic number, because the mean of its divisors is an integer number (43494045630).

Almost surely, 2^781690219050 is an apocalyptic number.

781690219050 is an abundant number, since it is smaller than the sum of its proper divisors (1306023971190).

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

781690219050 is a wasteful number, since it uses less digits than its factorization.

781690219050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400866807 (or 400866802 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 48.

The spelling of 781690219050 in words is "seven hundred eighty-one billion, six hundred ninety million, two hundred nineteen thousand, fifty".