1663952858425 has 24 divisors (see below), whose sum is σ = 2424018602880. Its totient is φ = 1117059259200.

The previous prime is 1663952858413. The next prime is 1663952858461. The reversal of 1663952858425 is 5248582593661.

It is not a de Polignac number, because 1663952858425 - 2¹⁵ = 1663952825657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232717105 + ... + 232724254.

It is an arithmetic number, because the mean of its divisors is an integer number (101000775120).

Almost surely, 2^{1663952858425} is an apocalyptic number.

It is an amenable number.

1663952858425 is a deficient number, since it is larger than the sum of its proper divisors (760065744455).

1663952858425 is a wasteful number, since it uses less digits than its factorization.

1663952858425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465441393 (or 465441388 counting only the distinct ones).

The product of its digits is 124416000, while the sum is 64.

The spelling of 1663952858425 in words is "one trillion, six hundred sixty-three billion, nine hundred fifty-two million, eight hundred fifty-eight thousand, four hundred twenty-five".