1253444442402 has 64 divisors (see below), whose sum is σ = 2559248400384. Its totient is φ = 409168573440.

The previous prime is 1253444442389. The next prime is 1253444442407. The reversal of 1253444442402 is 2042444443521.

It is a super-2 number, since 2×1253444442402² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1253444442407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47870338 + ... + 47896514.

It is an arithmetic number, because the mean of its divisors is an integer number (39988256256).

Almost surely, 2^{1253444442402} is an apocalyptic number.

1253444442402 is an abundant number, since it is smaller than the sum of its proper divisors (1305803957982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1253444442402 is a wasteful number, since it uses less digits than its factorization.

1253444442402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26943.

The product of its (nonzero) digits is 491520, while the sum is 39.

Adding to 1253444442402 its reverse (2042444443521), we get a palindrome (3295888885923).

The spelling of 1253444442402 in words is "one trillion, two hundred fifty-three billion, four hundred forty-four million, four hundred forty-two thousand, four hundred two".