1253012244136 has 8 divisors (see below), whose sum is σ = 2349397957770. Its totient is φ = 626506122064.

The previous prime is 1253012244091. The next prime is 1253012244139. The reversal of 1253012244136 is 6314422103521.

It can be written as a sum of positive squares in only one way, i.e., 907275300100 + 345736944036 = 952510^2 + 587994^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1253012244139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78313265251 + ... + 78313265266.

Almost surely, 2^{1253012244136} is an apocalyptic number.

It is an amenable number.

1253012244136 is a deficient number, since it is larger than the sum of its proper divisors (1096385713634).

1253012244136 is a wasteful number, since it uses less digits than its factorization.

1253012244136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156626530523 (or 156626530519 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 1253012244136 its reverse (6314422103521), we get a palindrome (7567434347657).

The spelling of 1253012244136 in words is "one trillion, two hundred fifty-three billion, twelve million, two hundred forty-four thousand, one hundred thirty-six".