1373648981253 has 32 divisors (see below), whose sum is σ = 1846681804800. Its totient is φ = 908224502400.

The previous prime is 1373648981251. The next prime is 1373648981293. The reversal of 1373648981253 is 3521898463731.

It is a happy number.

1373648981253 is a nontrivial binomial coefficient, being equal to C(1657498, 2).

It is not a de Polignac number, because 1373648981253 - 2¹ = 1373648981251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373648981251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316579758 + ... + 316584096.

It is an arithmetic number, because the mean of its divisors is an integer number (57708806400).

Almost surely, 2^{1373648981253} is an apocalyptic number.

1373648981253 is the 1657497-th triangular number and also the 828749-th hexagonal number.

It is an amenable number.

1373648981253 is a deficient number, since it is larger than the sum of its proper divisors (473032823547).

1373648981253 is a wasteful number, since it uses less digits than its factorization.

1373648981253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6073.

The product of its digits is 26127360, while the sum is 60.

The spelling of 1373648981253 in words is "one trillion, three hundred seventy-three billion, six hundred forty-eight million, nine hundred eighty-one thousand, two hundred fifty-three".