161455040 has 28 divisors (see below), whose sum is σ = 384465576. Its totient is φ = 64581888.

The previous prime is 161454991. The next prime is 161455043. The reversal of 161455040 is 40554161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161455043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251954 + ... + 252593.

Almost surely, 2^161455040 is an apocalyptic number.

161455040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161455040 is an abundant number, since it is smaller than the sum of its proper divisors (223010536).

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

161455040 is an equidigital number, since it uses as much as digits as its factorization.

161455040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504564 (or 504554 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 161455040 is about 12706.4959764681. The cubic root of 161455040 is about 544.5242207440.

The spelling of 161455040 in words is "one hundred sixty-one million, four hundred fifty-five thousand, forty".