18949958485425 has 768 divisors, whose sum is σ = 42290864640000. Its totient is φ = 8215835443200.

The previous prime is 18949958485421. The next prime is 18949958485427. The reversal of 18949958485425 is 52458485994981.

It is a happy number.

18949958485425 is a `hidden beast` number, since 1 + 8 + 9 + 4 + 9 + 9 + 584 + 8 + 5 + 4 + 25 = 666.

It is not a de Polignac number, because 18949958485425 - 2² = 18949958485421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18949958485421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 767 ways as a sum of consecutive naturals, for example, 70445942191 + ... + 70445942459.

It is an arithmetic number, because the mean of its divisors is an integer number (55066230000).

Almost surely, 2^{18949958485425} is an apocalyptic number.

18949958485425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18949958485425 is an abundant number, since it is smaller than the sum of its proper divisors (23340906154575).

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

18949958485425 is a wasteful number, since it uses less digits than its factorization.

18949958485425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 660 counting only the distinct ones).

The product of its digits is 5971968000, while the sum is 81.

The spelling of 18949958485425 in words is "eighteen trillion, nine hundred forty-nine billion, nine hundred fifty-eight million, four hundred eighty-five thousand, four hundred twenty-five".