1253400630644 has 24 divisors (see below), whose sum is σ = 2196405607368. Its totient is φ = 625856716800.

The previous prime is 1253400630631. The next prime is 1253400630653. The reversal of 1253400630644 is 4460360043521.

It can be written as a sum of positive squares in 4 ways, for example, as 305795728144 + 947604902500 = 552988^2 + 973450^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1253400630598 and 1253400630607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9343244 + ... + 9476444.

It is an arithmetic number, because the mean of its divisors is an integer number (91516900307).

Almost surely, 2^{1253400630644} is an apocalyptic number.

It is an amenable number.

1253400630644 is a deficient number, since it is larger than the sum of its proper divisors (943004976724).

1253400630644 is a wasteful number, since it uses less digits than its factorization.

1253400630644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136355 (or 136353 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 38.

The spelling of 1253400630644 in words is "one trillion, two hundred fifty-three billion, four hundred million, six hundred thirty thousand, six hundred forty-four".