161590026 has 96 divisors (see below), whose sum is σ = 370509120. Its totient is φ = 46904832.

The previous prime is 161590021. The next prime is 161590031. The reversal of 161590026 is 620095161.

It is an interprime number because it is at equal distance from previous prime (161590021) and next prime (161590031).

It is a super-2 number, since 2×161590026² = 52222673005361352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161589975 and 161590002.

It is not an unprimeable number, because it can be changed into a prime (161590021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2213526 + ... + 2213598.

It is an arithmetic number, because the mean of its divisors is an integer number (3859470).

Almost surely, 2^161590026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161590026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185254560).

161590026 is an abundant number, since it is smaller than the sum of its proper divisors (208919094).

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

161590026 is a wasteful number, since it uses less digits than its factorization.

161590026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 161590026 is about 12711.8065592582. The cubic root of 161590026 is about 544.6759299993.

The spelling of 161590026 in words is "one hundred sixty-one million, five hundred ninety thousand, twenty-six".