161051556 has 24 divisors (see below), whose sum is σ = 375993184. Its totient is φ = 53654400.

The previous prime is 161051509. The next prime is 161051593. The reversal of 161051556 is 655150161.

161051556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161051556² = 51875207380042272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37731 + ... + 41781.

Almost surely, 2^161051556 is an apocalyptic number.

It is an amenable number.

161051556 is an abundant number, since it is smaller than the sum of its proper divisors (214941628).

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

161051556 is a wasteful number, since it uses less digits than its factorization.

161051556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7371 (or 7369 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 161051556 is about 12690.6089688399. The cubic root of 161051556 is about 544.0702448579.

The spelling of 161051556 in words is "one hundred sixty-one million, fifty-one thousand, five hundred fifty-six".