781423713332 has 12 divisors (see below), whose sum is σ = 1367523084900. Its totient is φ = 390702831936.

The previous prime is 781423713289. The next prime is 781423713353. The reversal of 781423713332 is 233317324187.

It can be written as a sum of positive squares in 2 ways, for example, as 400443433636 + 380980279696 = 632806^2 + 617236^2 .

It is a super-2 number, since 2×781423713332² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2059457 + ... + 2409192.

It is an arithmetic number, because the mean of its divisors is an integer number (113960257075).

Almost surely, 2^781423713332 is an apocalyptic number.

It is an amenable number.

781423713332 is a deficient number, since it is larger than the sum of its proper divisors (586099371568).

781423713332 is a wasteful number, since it uses less digits than its factorization.

781423713332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512370 (or 4512368 counting only the distinct ones).

The product of its digits is 508032, while the sum is 44.

The spelling of 781423713332 in words is "seven hundred eighty-one billion, four hundred twenty-three million, seven hundred thirteen thousand, three hundred thirty-two".