161551480 has 32 divisors (see below), whose sum is σ = 372360240. Its totient is φ = 63043840.

The previous prime is 161551477. The next prime is 161551487. The reversal of 161551480 is 84155161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161551487) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 47614 + ... + 50893.

Almost surely, 2^161551480 is an apocalyptic number.

161551480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161551480 is an abundant number, since it is smaller than the sum of its proper divisors (210808760).

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

161551480 is a wasteful number, since it uses less digits than its factorization.

161551480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98559 (or 98555 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 161551480 is about 12710.2903192649. The cubic root of 161551480 is about 544.6326172022.

The spelling of 161551480 in words is "one hundred sixty-one million, five hundred fifty-one thousand, four hundred eighty".