1990544090384 has 10 divisors (see below), whose sum is σ = 3856679175150. Its totient is φ = 995272045184.

The previous prime is 1990544090371. The next prime is 1990544090387. The reversal of 1990544090384 is 4830904450991.

It can be written as a sum of positive squares in only one way, i.e., 1583500090384 + 407044000000 = 1258372^2 + 638000^2 .

It is a super-2 number, since 2×1990544090384² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1990544090387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62204502809 + ... + 62204502840.

It is an arithmetic number, because the mean of its divisors is an integer number (385667917515).

Almost surely, 2^{1990544090384} is an apocalyptic number.

It is an amenable number.

1990544090384 is a deficient number, since it is larger than the sum of its proper divisors (1866135084766).

1990544090384 is a wasteful number, since it uses less digits than its factorization.

1990544090384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124409005657 (or 124409005651 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 1990544090384 in words is "one trillion, nine hundred ninety billion, five hundred forty-four million, ninety thousand, three hundred eighty-four".