1899961311996 has 72 divisors (see below), whose sum is σ = 5257800946944. Its totient is φ = 573711380640.

The previous prime is 1899961311977. The next prime is 1899961312003. The reversal of 1899961311996 is 6991131699981.

1899961311996 is a `hidden beast` number, since 1 + 89 + 99 + 61 + 311 + 9 + 96 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8364756 + ... + 8588891.

It is an arithmetic number, because the mean of its divisors is an integer number (73025013152).

Almost surely, 2^{1899961311996} is an apocalyptic number.

It is an amenable number.

1899961311996 is an abundant number, since it is smaller than the sum of its proper divisors (3357839634948).

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

1899961311996 is a wasteful number, since it uses less digits than its factorization.

1899961311996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16953951 (or 16953946 counting only the distinct ones).

The product of its digits is 51018336, while the sum is 72.

The spelling of 1899961311996 in words is "one trillion, eight hundred ninety-nine billion, nine hundred sixty-one million, three hundred eleven thousand, nine hundred ninety-six".