1663801802990 has 32 divisors (see below), whose sum is σ = 2997171887616. Its totient is φ = 665003416320.

The previous prime is 1663801802987. The next prime is 1663801803017. The reversal of 1663801802990 is 992081083661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150279155 + ... + 150290225.

It is an arithmetic number, because the mean of its divisors is an integer number (93661621488).

Almost surely, 2^{1663801802990} is an apocalyptic number.

1663801802990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1663801802990 is a deficient number, since it is larger than the sum of its proper divisors (1333370084626).

1663801802990 is a wasteful number, since it uses less digits than its factorization.

1663801802990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21404.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The spelling of 1663801802990 in words is "one trillion, six hundred sixty-three billion, eight hundred one million, eight hundred two thousand, nine hundred ninety".