1253143965938 has 6 divisors (see below), whose sum is σ = 1879718323599. Its totient is φ = 626571191406.

The previous prime is 1253143965937. The next prime is 1253143965943. The reversal of 1253143965938 is 8395693413521.

It can be written as a sum of positive squares in only one way, i.e., 626571982969 + 626571982969 = 791563^2 + 791563^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=791563.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1253143965937) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1187345 + ... + 1978907.

Almost surely, 2^{1253143965938} is an apocalyptic number.

1253143965938 is a deficient number, since it is larger than the sum of its proper divisors (626574357661).

1253143965938 is an frugal number, since it uses more digits than its factorization.

1253143965938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583128 (or 791565 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 59.

The spelling of 1253143965938 in words is "one trillion, two hundred fifty-three billion, one hundred forty-three million, nine hundred sixty-five thousand, nine hundred thirty-eight".