1263131881257 has 8 divisors (see below), whose sum is σ = 1684445033376. Its totient is φ = 841953324992.

The previous prime is 1263131881237. The next prime is 1263131881261. The reversal of 1263131881257 is 7521881313621.

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

It is a cyclic number.

It is not a de Polignac number, because 1263131881257 - 2²³ = 1263123492649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1263131881217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33627063 + ... + 33664604.

It is an arithmetic number, because the mean of its divisors is an integer number (210555629172).

Almost surely, 2^{1263131881257} is an apocalyptic number.

It is an amenable number.

1263131881257 is a deficient number, since it is larger than the sum of its proper divisors (421313152119).

1263131881257 is an equidigital number, since it uses as much as digits as its factorization.

1263131881257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67297927.

The product of its digits is 483840, while the sum is 48.

The spelling of 1263131881257 in words is "one trillion, two hundred sixty-three billion, one hundred thirty-one million, eight hundred eighty-one thousand, two hundred fifty-seven".