1999990648775 has 96 divisors (see below), whose sum is σ = 3035655705600. Its totient is φ = 1276638796800.

The previous prime is 1999990648771. The next prime is 1999990648781. The reversal of 1999990648775 is 5778460999991.

It is not a de Polignac number, because 1999990648775 - 2² = 1999990648771 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1999990648693 and 1999990648702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999990648771) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 65277710 + ... + 65308340.

It is an arithmetic number, because the mean of its divisors is an integer number (31621413600).

Almost surely, 2^{1999990648775} is an apocalyptic number.

1999990648775 is a deficient number, since it is larger than the sum of its proper divisors (1035665056825).

1999990648775 is a wasteful number, since it uses less digits than its factorization.

1999990648775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31009 (or 31004 counting only the distinct ones).

The product of its (nonzero) digits is 2777664960, while the sum is 83.

The spelling of 1999990648775 in words is "one trillion, nine hundred ninety-nine billion, nine hundred ninety million, six hundred forty-eight thousand, seven hundred seventy-five".