1316261600781 has 8 divisors (see below), whose sum is σ = 1758589839264. Its totient is φ = 875720548080.

The previous prime is 1316261600767. The next prime is 1316261600789. The reversal of 1316261600781 is 1870061626131.

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

It is a de Polignac number, because none of the positive numbers 2^k-1316261600781 is a prime.

It is a super-2 number, since 2×1316261600781² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316261600789) 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, 446794726 + ... + 446797671.

It is an arithmetic number, because the mean of its divisors is an integer number (219823729908).

Almost surely, 2^{1316261600781} is an apocalyptic number.

It is an amenable number.

1316261600781 is a deficient number, since it is larger than the sum of its proper divisors (442328238483).

1316261600781 is an equidigital number, since it uses as much as digits as its factorization.

1316261600781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893592891.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 1316261600781 in words is "one trillion, three hundred sixteen billion, two hundred sixty-one million, six hundred thousand, seven hundred eighty-one".