781348612 has 12 divisors (see below), whose sum is σ = 1491665616. Its totient is φ = 355158440.

The previous prime is 781348597. The next prime is 781348643. The reversal of 781348612 is 216843187.

It is a super-2 number, since 2×781348612² = 1221011306948653088, which contains 22 as substring.

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, 8878918 + ... + 8879005.

It is an arithmetic number, because the mean of its divisors is an integer number (124305468).

Almost surely, 2^781348612 is an apocalyptic number.

It is an amenable number.

781348612 is a deficient number, since it is larger than the sum of its proper divisors (710317004).

781348612 is a wasteful number, since it uses less digits than its factorization.

781348612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17757938 (or 17757936 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 781348612 is about 27952.6136881688. The cubic root of 781348612 is about 921.0466239326.

The spelling of 781348612 in words is "seven hundred eighty-one million, three hundred forty-eight thousand, six hundred twelve".