1253561663604 has 24 divisors (see below), whose sum is σ = 2992999942240. Its totient is φ = 408136355424.

The previous prime is 1253561663593. The next prime is 1253561663611. The reversal of 1253561663604 is 4063661653521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1214691019 + ... + 1214692050.

Almost surely, 2^{1253561663604} is an apocalyptic number.

It is an amenable number.

1253561663604 is an abundant number, since it is smaller than the sum of its proper divisors (1739438278636).

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

1253561663604 is a wasteful number, since it uses less digits than its factorization.

1253561663604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429383119 (or 2429383117 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 1253561663604 in words is "one trillion, two hundred fifty-three billion, five hundred sixty-one million, six hundred sixty-three thousand, six hundred four".