1253478189794 has 16 divisors (see below), whose sum is σ = 1888556681088. Its totient is φ = 623961940992.

The previous prime is 1253478189779. The next prime is 1253478189797. The reversal of 1253478189794 is 4979818743521.

It is not an unprimeable number, because it can be changed into a prime (1253478189797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289187 + ... + 1609529.

It is an arithmetic number, because the mean of its divisors is an integer number (118034792568).

Almost surely, 2^{1253478189794} is an apocalyptic number.

1253478189794 is a deficient number, since it is larger than the sum of its proper divisors (635078491294).

1253478189794 is a wasteful number, since it uses less digits than its factorization.

1253478189794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322449.

The product of its digits is 121927680, while the sum is 68.

The spelling of 1253478189794 in words is "one trillion, two hundred fifty-three billion, four hundred seventy-eight million, one hundred eighty-nine thousand, seven hundred ninety-four".