1263661442331 has 8 divisors (see below), whose sum is σ = 1685379098640. Its totient is φ = 842192373792.

The previous prime is 1263661442317. The next prime is 1263661442339. The reversal of 1263661442331 is 1332441663621.

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

It is not a de Polignac number, because 1263661442331 - 2⁵ = 1263661442299 is a prime.

It is a super-2 number, since 2×1263661442331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1263661442339) 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, 62135080 + ... + 62155413.

It is an arithmetic number, because the mean of its divisors is an integer number (210672387330).

Almost surely, 2^{1263661442331} is an apocalyptic number.

1263661442331 is a deficient number, since it is larger than the sum of its proper divisors (421717656309).

1263661442331 is a wasteful number, since it uses less digits than its factorization.

1263661442331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124293885.

The product of its digits is 373248, while the sum is 42.

The spelling of 1263661442331 in words is "one trillion, two hundred sixty-three billion, six hundred sixty-one million, four hundred forty-two thousand, three hundred thirty-one".