1263694898801 has 2 divisors, whose sum is σ = 1263694898802. Its totient is φ = 1263694898800.

The previous prime is 1263694898783. The next prime is 1263694898857. The reversal of 1263694898801 is 1088984963621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1229847730225 + 33847168576 = 1108985^2 + 183976^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263694898801 - 2¹⁸ = 1263694636657 is a prime.

It is not a weakly prime, because it can be changed into another prime (1263694898891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631847449400 + 631847449401.

It is an arithmetic number, because the mean of its divisors is an integer number (631847449401).

Almost surely, 2^{1263694898801} is an apocalyptic number.

It is an amenable number.

1263694898801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263694898801 is an equidigital number, since it uses as much as digits as its factorization.

1263694898801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35831808, while the sum is 65.

The spelling of 1263694898801 in words is "one trillion, two hundred sixty-three billion, six hundred ninety-four million, eight hundred ninety-eight thousand, eight hundred one".