781132321212323 has 16 divisors (see below), whose sum is σ = 788220485125920. Its totient is φ = 774073820330496.

The previous prime is 781132321212317. The next prime is 781132321212371. The reversal of 781132321212323 is 323212123231187.

It is a cyclic number.

It is not a de Polignac number, because 781132321212323 - 2³⁶ = 781063601735587 is a prime.

It is a super-2 number, since 2×781132321212323² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (781132321212223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4507390811 + ... + 4507564107.

It is an arithmetic number, because the mean of its divisors is an integer number (49263780320370).

Almost surely, 2^{781132321212323} is an apocalyptic number.

781132321212323 is a deficient number, since it is larger than the sum of its proper divisors (7088163913597).

781132321212323 is a wasteful number, since it uses less digits than its factorization.

781132321212323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258646.

The product of its digits is 145152, while the sum is 41.

The spelling of 781132321212323 in words is "seven hundred eighty-one trillion, one hundred thirty-two billion, three hundred twenty-one million, two hundred twelve thousand, three hundred twenty-three".