1899656691968 has 288 divisors, whose sum is σ = 4781862715392. Its totient is φ = 735219302400.

The previous prime is 1899656691953. The next prime is 1899656691973. The reversal of 1899656691968 is 8691966569981.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52367405 + ... + 52403667.

It is an arithmetic number, because the mean of its divisors is an integer number (16603689984).

Almost surely, 2^{1899656691968} 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 1899656691968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2390931357696).

1899656691968 is an abundant number, since it is smaller than the sum of its proper divisors (2882206023424).

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

1899656691968 is a wasteful number, since it uses less digits than its factorization.

1899656691968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36381 (or 36367 counting only the distinct ones).

The product of its digits is 2720977920, while the sum is 83.

The spelling of 1899656691968 in words is "one trillion, eight hundred ninety-nine billion, six hundred fifty-six million, six hundred ninety-one thousand, nine hundred sixty-eight".