161563510 has 8 divisors (see below), whose sum is σ = 290814336. Its totient is φ = 64625400.

The previous prime is 161563463. The next prime is 161563541. The reversal of 161563510 is 15365161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×161563510² = 52205535527040200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8078166 + ... + 8078185.

It is an arithmetic number, because the mean of its divisors is an integer number (36351792).

Almost surely, 2^161563510 is an apocalyptic number.

161563510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161563510 is a deficient number, since it is larger than the sum of its proper divisors (129250826).

161563510 is a wasteful number, since it uses less digits than its factorization.

161563510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16156358.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 161563510 is about 12710.7635490556. The cubic root of 161563510 is about 544.6461356335.

The spelling of 161563510 in words is "one hundred sixty-one million, five hundred sixty-three thousand, five hundred ten".