161547090 has 32 divisors (see below), whose sum is σ = 410520960. Its totient is φ = 40545024.

The previous prime is 161547083. The next prime is 161547091. The reversal of 161547090 is 90745161.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161547091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157870 + ... + 158889.

It is an arithmetic number, because the mean of its divisors is an integer number (12828780).

Almost surely, 2^161547090 is an apocalyptic number.

161547090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161547090 is an abundant number, since it is smaller than the sum of its proper divisors (248973870).

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

161547090 is a wasteful number, since it uses less digits than its factorization.

161547090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316786.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 161547090 is about 12710.1176233739. The cubic root of 161547090 is about 544.6276838752.

The spelling of 161547090 in words is "one hundred sixty-one million, five hundred forty-seven thousand, ninety".