161629356664 has 16 divisors (see below), whose sum is σ = 310102836120. Its totient is φ = 78935267040.

The previous prime is 161629356641. The next prime is 161629356683. The reversal of 161629356664 is 466653926161.

It is a super-2 number, since 2×161629356664² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234926047 + ... + 234926734.

Almost surely, 2^161629356664 is an apocalyptic number.

It is an amenable number.

161629356664 is a deficient number, since it is larger than the sum of its proper divisors (148473479456).

161629356664 is a wasteful number, since it uses less digits than its factorization.

161629356664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469852830 (or 469852826 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 55.

The spelling of 161629356664 in words is "one hundred sixty-one billion, six hundred twenty-nine million, three hundred fifty-six thousand, six hundred sixty-four".