1263309053953 has 4 divisors (see below), whose sum is σ = 1263327895620. Its totient is φ = 1263290212288.

The previous prime is 1263309053893. The next prime is 1263309053983. The reversal of 1263309053953 is 3593509033621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66271749489 + 1197037304464 = 257433^2 + 1094092^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263309053953 - 2³³ = 1254719119361 is a prime.

It is a super-3 number, since 3×1263309053953³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1263309053897 and 1263309053906.

It is not an unprimeable number, because it can be changed into a prime (1263309053983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9319900 + ... + 9454477.

It is an arithmetic number, because the mean of its divisors is an integer number (315831973905).

Almost surely, 2^{1263309053953} is an apocalyptic number.

It is an amenable number.

1263309053953 is a deficient number, since it is larger than the sum of its proper divisors (18841667).

1263309053953 is an equidigital number, since it uses as much as digits as its factorization.

1263309053953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18841666.

The product of its (nonzero) digits is 1968300, while the sum is 49.

The spelling of 1263309053953 in words is "one trillion, two hundred sixty-three billion, three hundred nine million, fifty-three thousand, nine hundred fifty-three".