781475247852 has 24 divisors (see below), whose sum is σ = 1963707033456. Its totient is φ = 240453922368.

The previous prime is 781475247809. The next prime is 781475247863. The reversal of 781475247852 is 258742574187.

It is a super-2 number, since 2×781475247852² (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 7 ways as a sum of consecutive naturals, for example, 2504728203 + ... + 2504728514.

It is an arithmetic number, because the mean of its divisors is an integer number (81821126394).

Almost surely, 2^781475247852 is an apocalyptic number.

It is an amenable number.

781475247852 is an abundant number, since it is smaller than the sum of its proper divisors (1182231785604).

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

781475247852 is a wasteful number, since it uses less digits than its factorization.

781475247852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5009456737 (or 5009456735 counting only the distinct ones).

The product of its digits is 35123200, while the sum is 60.

The spelling of 781475247852 in words is "seven hundred eighty-one billion, four hundred seventy-five million, two hundred forty-seven thousand, eight hundred fifty-two".