161574711672 has 128 divisors (see below), whose sum is σ = 460062789120. Its totient is φ = 46808256000.

The previous prime is 161574711611. The next prime is 161574711677. The reversal of 161574711672 is 276117475161.

It is a super-2 number, since 2×161574711672² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161574711677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13479922 + ... + 13491902.

It is an arithmetic number, because the mean of its divisors is an integer number (3594240540).

Almost surely, 2^161574711672 is an apocalyptic number.

161574711672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161574711672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230031394560).

161574711672 is an abundant number, since it is smaller than the sum of its proper divisors (298488077448).

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

161574711672 is a wasteful number, since it uses less digits than its factorization.

161574711672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14245 (or 14241 counting only the distinct ones).

The product of its digits is 493920, while the sum is 48.

The spelling of 161574711672 in words is "one hundred sixty-one billion, five hundred seventy-four million, seven hundred eleven thousand, six hundred seventy-two".