1990543941952 has 56 divisors (see below), whose sum is σ = 3966944702112. Its totient is φ = 991001280000.

The previous prime is 1990543941907. The next prime is 1990543941979. The reversal of 1990543941952 is 2591493450991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57507883 + ... + 57542485.

It is an arithmetic number, because the mean of its divisors is an integer number (70838298252).

Almost surely, 2^{1990543941952} is an apocalyptic number.

It is an amenable number.

1990543941952 is a deficient number, since it is larger than the sum of its proper divisors (1976400760160).

1990543941952 is a wasteful number, since it uses less digits than its factorization.

1990543941952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38447 (or 38437 counting only the distinct ones).

The product of its (nonzero) digits is 15746400, while the sum is 61.

The spelling of 1990543941952 in words is "one trillion, nine hundred ninety billion, five hundred forty-three million, nine hundred forty-one thousand, nine hundred fifty-two".