19613351643948 has 144 divisors (see below), whose sum is σ = 52907550631936. Its totient is φ = 6116040483840.

The previous prime is 19613351643881. The next prime is 19613351643971. The reversal of 19613351643948 is 84934615331691.

19613351643948 is a `hidden beast` number, since 1 + 9 + 6 + 1 + 33 + 516 + 43 + 9 + 48 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2548065 + ... + 6761607.

Almost surely, 2^{19613351643948} is an apocalyptic number.

19613351643948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19613351643948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26453775315968).

19613351643948 is an abundant number, since it is smaller than the sum of its proper divisors (33294198987988).

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

19613351643948 is a wasteful number, since it uses less digits than its factorization.

19613351643948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4213724 (or 4213719 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 63.

The spelling of 19613351643948 in words is "nineteen trillion, six hundred thirteen billion, three hundred fifty-one million, six hundred forty-three thousand, nine hundred forty-eight".