161627145 has 32 divisors (see below), whose sum is σ = 263983104. Its totient is φ = 84427200.

The previous prime is 161627131. The next prime is 161627161. The reversal of 161627145 is 541726161.

It is not a de Polignac number, because 161627145 - 2⁵ = 161627113 is a prime.

It is a super-2 number, since 2×161627145² = 52246668001702050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162600 + ... + 163590.

It is an arithmetic number, because the mean of its divisors is an integer number (8249472).

Almost surely, 2^161627145 is an apocalyptic number.

161627145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161627145 is a deficient number, since it is larger than the sum of its proper divisors (102355959).

161627145 is a wasteful number, since it uses less digits than its factorization.

161627145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213.

The product of its digits is 10080, while the sum is 33.

The square root of 161627145 is about 12713.2664960662. The cubic root of 161627145 is about 544.7176328165.

The spelling of 161627145 in words is "one hundred sixty-one million, six hundred twenty-seven thousand, one hundred forty-five".