1662534451664 has 20 divisors (see below), whose sum is σ = 3225703766820. Its totient is φ = 830094769920.

The previous prime is 1662534451637. The next prime is 1662534451667. The reversal of 1662534451664 is 4661544352661.

It can be written as a sum of positive squares in 2 ways, for example, as 519149070400 + 1143385381264 = 720520^2 + 1069292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662534451667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73266797 + ... + 73289484.

It is an arithmetic number, because the mean of its divisors is an integer number (161285188341).

Almost surely, 2^{1662534451664} is an apocalyptic number.

It is an amenable number.

1662534451664 is a deficient number, since it is larger than the sum of its proper divisors (1563169315156).

1662534451664 is a wasteful number, since it uses less digits than its factorization.

1662534451664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146556998 (or 146556992 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 53.

The spelling of 1662534451664 in words is "one trillion, six hundred sixty-two billion, five hundred thirty-four million, four hundred fifty-one thousand, six hundred sixty-four".