1663821274204 has 12 divisors (see below), whose sum is σ = 2911711910800. Its totient is φ = 831903585408.

The previous prime is 1663821274133. The next prime is 1663821274211. The reversal of 1663821274204 is 4024721283661.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1212984 + ... + 2190655.

Almost surely, 2^{1663821274204} is an apocalyptic number.

It is an amenable number.

1663821274204 is a deficient number, since it is larger than the sum of its proper divisors (1247890636596).

1663821274204 is a wasteful number, since it uses less digits than its factorization.

1663821274204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3525852 (or 3525850 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 1663821274204 in words is "one trillion, six hundred sixty-three billion, eight hundred twenty-one million, two hundred seventy-four thousand, two hundred four".