1297621912863 has 8 divisors (see below), whose sum is σ = 1730342383488. Its totient is φ = 864991358744.

The previous prime is 1297621912823. The next prime is 1297621912891. The reversal of 1297621912863 is 3682191267921.

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 1297621912863 - 2¹² = 1297621908767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297621912813) 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, 22445445 + ... + 22503182.

It is an arithmetic number, because the mean of its divisors is an integer number (216292797936).

Almost surely, 2^{1297621912863} is an apocalyptic number.

1297621912863 is a deficient number, since it is larger than the sum of its proper divisors (432720470625).

1297621912863 is an equidigital number, since it uses as much as digits as its factorization.

1297621912863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44958253.

The product of its digits is 3919104, while the sum is 57.

The spelling of 1297621912863 in words is "one trillion, two hundred ninety-seven billion, six hundred twenty-one million, nine hundred twelve thousand, eight hundred sixty-three".