161553345064 has 16 divisors (see below), whose sum is σ = 304038594900. Its totient is φ = 80476386432.

The previous prime is 161553345061. The next prime is 161553345071. The reversal of 161553345064 is 460543355161.

It can be written as a sum of positive squares in 2 ways, for example, as 161531648100 + 21696964 = 401910^2 + 4658^2 .

It is a super-3 number, since 3×161553345064³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161553345064.

It is not an unprimeable number, because it can be changed into a prime (161553345061) by changing a digit.

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, 37533477 + ... + 37537780.

Almost surely, 2^161553345064 is an apocalyptic number.

It is an amenable number.

161553345064 is a deficient number, since it is larger than the sum of its proper divisors (142485249836).

161553345064 is a wasteful number, since it uses less digits than its factorization.

161553345064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75071532 (or 75071528 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 161553345064 in words is "one hundred sixty-one billion, five hundred fifty-three million, three hundred forty-five thousand, sixty-four".