781326461 has 8 divisors (see below), whose sum is σ = 790781760. Its totient is φ = 771886368.

The previous prime is 781326451. The next prime is 781326467. The reversal of 781326461 is 164623187.

781326461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-781326461 is a prime.

It is a super-2 number, since 2×781326461² = 1220942077317569042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781326467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125750 + ... + 131816.

It is an arithmetic number, because the mean of its divisors is an integer number (98847720).

Almost surely, 2^781326461 is an apocalyptic number.

It is an amenable number.

781326461 is a deficient number, since it is larger than the sum of its proper divisors (9455299).

781326461 is a wasteful number, since it uses less digits than its factorization.

781326461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7603.

The product of its digits is 48384, while the sum is 38.

The square root of 781326461 is about 27952.2174612319. The cubic root of 781326461 is about 921.0379200514.

The spelling of 781326461 in words is "seven hundred eighty-one million, three hundred twenty-six thousand, four hundred sixty-one".