1664615594158 has 16 divisors (see below), whose sum is σ = 2723979244464. Its totient is φ = 756626002560.

The previous prime is 1664615594143. The next prime is 1664615594207. The reversal of 1664615594158 is 8514955164661.

It is a junction number, because it is equal to n+sod(n) for n = 1664615594096 and 1664615594105.

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, 128716 + ... + 1829152.

It is an arithmetic number, because the mean of its divisors is an integer number (170248702779).

Almost surely, 2^{1664615594158} is an apocalyptic number.

1664615594158 is a deficient number, since it is larger than the sum of its proper divisors (1059363650306).

1664615594158 is a wasteful number, since it uses less digits than its factorization.

1664615594158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744947.

The product of its digits is 31104000, while the sum is 61.

The spelling of 1664615594158 in words is "one trillion, six hundred sixty-four billion, six hundred fifteen million, five hundred ninety-four thousand, one hundred fifty-eight".