161572885716 has 48 divisors (see below), whose sum is σ = 411315549120. Its totient is φ = 48956824320.

The previous prime is 161572885687. The next prime is 161572885759. The reversal of 161572885716 is 617588275161.

It is a super-2 number, since 2×161572885716² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1490590 + ... + 1595306.

It is an arithmetic number, because the mean of its divisors is an integer number (8569073940).

Almost surely, 2^161572885716 is an apocalyptic number.

It is an amenable number.

161572885716 is an abundant number, since it is smaller than the sum of its proper divisors (249742663404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161572885716 is a wasteful number, since it uses less digits than its factorization.

161572885716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116424 (or 116422 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 57.

The spelling of 161572885716 in words is "one hundred sixty-one billion, five hundred seventy-two million, eight hundred eighty-five thousand, seven hundred sixteen".