19648260464 has 20 divisors (see below), whose sum is σ = 43506862704. Its totient is φ = 8420683008.

The previous prime is 19648260461. The next prime is 19648260481. The reversal of 19648260464 is 46406284691.

It is a super-2 number, since 2×19648260464² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19648260461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87715337 + ... + 87715560.

Almost surely, 2^19648260464 is an apocalyptic number.

19648260464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19648260464 is an abundant number, since it is smaller than the sum of its proper divisors (23858602240).

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

19648260464 is a wasteful number, since it uses less digits than its factorization.

19648260464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175430912 (or 175430906 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 50.

The spelling of 19648260464 in words is "nineteen billion, six hundred forty-eight million, two hundred sixty thousand, four hundred sixty-four".