1236422116553 has 4 divisors (see below), whose sum is σ = 1331531510148. Its totient is φ = 1141312722960.

The previous prime is 1236422116511. The next prime is 1236422116607. The reversal of 1236422116553 is 3556112246321.

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 615805881289 + 620616235264 = 784733^2 + 787792^2 .

It is a cyclic number.

It is not a de Polignac number, because 1236422116553 - 2⁸ = 1236422116297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1236422116553.

It is not an unprimeable number, because it can be changed into a prime (1236422116453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47554696778 + ... + 47554696803.

It is an arithmetic number, because the mean of its divisors is an integer number (332882877537).

Almost surely, 2^{1236422116553} is an apocalyptic number.

1236422116553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1236422116553 is a deficient number, since it is larger than the sum of its proper divisors (95109393595).

1236422116553 is an equidigital number, since it uses as much as digits as its factorization.

1236422116553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95109393594.

The product of its digits is 259200, while the sum is 41.

The spelling of 1236422116553 in words is "one trillion, two hundred thirty-six billion, four hundred twenty-two million, one hundred sixteen thousand, five hundred fifty-three".