19648626825 has 12 divisors (see below), whose sum is σ = 32485729808. Its totient is φ = 10479267600.

The previous prime is 19648626817. The next prime is 19648626847. The reversal of 19648626825 is 52862684691.

It is a happy number.

It is not a de Polignac number, because 19648626825 - 2³ = 19648626817 is a prime.

It is a super-2 number, since 2×19648626825² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130990771 + ... + 130990920.

Almost surely, 2^19648626825 is an apocalyptic number.

19648626825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19648626825 is a deficient number, since it is larger than the sum of its proper divisors (12837102983).

19648626825 is a wasteful number, since it uses less digits than its factorization.

19648626825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261981704 (or 261981699 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 57.

The spelling of 19648626825 in words is "nineteen billion, six hundred forty-eight million, six hundred twenty-six thousand, eight hundred twenty-five".