1662615983889 has 48 divisors (see below), whose sum is σ = 2755830435072. Its totient is φ = 946196619264.

The previous prime is 1662615983881. The next prime is 1662615983969. The reversal of 1662615983889 is 9883895162661.

1662615983889 is a `hidden beast` number, since 1 + 6 + 6 + 26 + 1 + 598 + 3 + 8 + 8 + 9 = 666.

It is not a de Polignac number, because 1662615983889 - 2³ = 1662615983881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1662615983881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22699444 + ... + 22772570.

It is an arithmetic number, because the mean of its divisors is an integer number (57413134064).

Almost surely, 2^{1662615983889} is an apocalyptic number.

It is an amenable number.

1662615983889 is a deficient number, since it is larger than the sum of its proper divisors (1093214451183).

1662615983889 is a wasteful number, since it uses less digits than its factorization.

1662615983889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74606 (or 74603 counting only the distinct ones).

The product of its digits is 268738560, while the sum is 72.

The spelling of 1662615983889 in words is "one trillion, six hundred sixty-two billion, six hundred fifteen million, nine hundred eighty-three thousand, eight hundred eighty-nine".