161153520 has 80 divisors (see below), whose sum is σ = 545000832. Its totient is φ = 39066880.

The previous prime is 161153519. The next prime is 161153527. The reversal of 161153520 is 25351161.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161153527) 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, 27882 + ... + 33161.

Almost surely, 2^161153520 is an apocalyptic number.

161153520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161153520 is an abundant number, since it is smaller than the sum of its proper divisors (383847312).

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

161153520 is a wasteful number, since it uses less digits than its factorization.

161153520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61070 (or 61064 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 161153520 is about 12694.6256344959. The cubic root of 161153520 is about 544.1850401373.

The spelling of 161153520 in words is "one hundred sixty-one million, one hundred fifty-three thousand, five hundred twenty".