19048557816 has 96 divisors (see below), whose sum is σ = 52074725040. Its totient is φ = 6290041344.

The previous prime is 19048557797. The next prime is 19048557823. The reversal of 19048557816 is 61875584091.

It is a happy number.

19048557816 is a `hidden beast` number, since 1 + 9 + 0 + 4 + 8 + 557 + 81 + 6 = 666.

It is a congruent number.

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, 5492515 + ... + 5495981.

Almost surely, 2^19048557816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19048557816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26037362520).

19048557816 is an abundant number, since it is smaller than the sum of its proper divisors (33026167224).

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

19048557816 is a wasteful number, since it uses less digits than its factorization.

19048557816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4173 (or 4166 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 19048557816 in words is "nineteen billion, forty-eight million, five hundred fifty-seven thousand, eight hundred sixteen".