1899878493744 has 480 divisors, whose sum is σ = 6867383697408. Its totient is φ = 475844544000.

The previous prime is 1899878493719. The next prime is 1899878493757. The reversal of 1899878493744 is 4473948789981.

1899878493744 is a `hidden beast` number, since 1 + 8 + 9 + 9 + 87 + 8 + 493 + 7 + 44 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 97265259 + ... + 97284789.

Almost surely, 2^{1899878493744} is an apocalyptic number.

1899878493744 is a gapful number since it is divisible by the number (14) 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 1899878493744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3433691848704).

1899878493744 is an abundant number, since it is smaller than the sum of its proper divisors (4967505203664).

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

1899878493744 is a wasteful number, since it uses less digits than its factorization.

1899878493744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19877 (or 19868 counting only the distinct ones).

The product of its digits is 3511517184, while the sum is 81.

The spelling of 1899878493744 in words is "one trillion, eight hundred ninety-nine billion, eight hundred seventy-eight million, four hundred ninety-three thousand, seven hundred forty-four".