1253618252478 has 12 divisors (see below), whose sum is σ = 2716172880408. Its totient is φ = 417872750820.

The previous prime is 1253618252459. The next prime is 1253618252479. The reversal of 1253618252478 is 8742528163521.

It is a happy number.

1253618252478 is a `hidden beast` number, since 1 + 2 + 5 + 36 + 1 + 82 + 524 + 7 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253618252479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34822729218 + ... + 34822729253.

It is an arithmetic number, because the mean of its divisors is an integer number (226347740034).

Almost surely, 2^{1253618252478} is an apocalyptic number.

1253618252478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1253618252478 is an abundant number, since it is smaller than the sum of its proper divisors (1462554627930).

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

1253618252478 is a wasteful number, since it uses less digits than its factorization.

1253618252478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69645458479 (or 69645458476 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 54.

The spelling of 1253618252478 in words is "one trillion, two hundred fifty-three billion, six hundred eighteen million, two hundred fifty-two thousand, four hundred seventy-eight".