1236950581253 has 2 divisors, whose sum is σ = 1236950581254. Its totient is φ = 1236950581252.

The previous prime is 1236950581199. The next prime is 1236950581259. The reversal of 1236950581253 is 3521850596321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1123975271329 + 112975309924 = 1060177^2 + 336118^2 .

It is an emirp because it is prime and its reverse (3521850596321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1236950581253 - 2¹² = 1236950577157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1236950581259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618475290626 + 618475290627.

It is an arithmetic number, because the mean of its divisors is an integer number (618475290627).

Almost surely, 2^{1236950581253} is an apocalyptic number.

It is an amenable number.

1236950581253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1236950581253 is an equidigital number, since it uses as much as digits as its factorization.

1236950581253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944000, while the sum is 50.

The spelling of 1236950581253 in words is "one trillion, two hundred thirty-six billion, nine hundred fifty million, five hundred eighty-one thousand, two hundred fifty-three".