1671509664634 has 16 divisors (see below), whose sum is σ = 2575401466248. Its totient is φ = 813049054272.

The previous prime is 1671509664607. The next prime is 1671509664707. The reversal of 1671509664634 is 4364669051761.

It can be written as a sum of positive squares in 4 ways, for example, as 1532681140225 + 138828524409 = 1238015^2 + 372597^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1120929 + ... + 2144644.

Almost surely, 2^{1671509664634} is an apocalyptic number.

1671509664634 is a deficient number, since it is larger than the sum of its proper divisors (903891801614).

1671509664634 is a wasteful number, since it uses less digits than its factorization.

1671509664634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272529.

The product of its (nonzero) digits is 19595520, while the sum is 58.

The spelling of 1671509664634 in words is "one trillion, six hundred seventy-one billion, five hundred nine million, six hundred sixty-four thousand, six hundred thirty-four".