61109120 has 32 divisors (see below), whose sum is σ = 146090520. Its totient is φ = 24443392.

The previous prime is 61109093. The next prime is 61109123. The reversal of 61109120 is 2190116.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 61109092 and 61109101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61109123) 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 3 ways as a sum of consecutive naturals, for example, 47102 + ... + 48381.

Almost surely, 2^61109120 is an apocalyptic number.

It is an amenable number.

61109120 is an abundant number, since it is smaller than the sum of its proper divisors (84981400).

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

61109120 is an equidigital number, since it uses as much as digits as its factorization.

61109120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95502 (or 95490 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 61109120 is about 7817.2322467738. The cubic root of 61109120 is about 393.8843055740.

Adding to 61109120 its reverse (2190116), we get a palindrome (63299236).

The spelling of 61109120 in words is "sixty-one million, one hundred nine thousand, one hundred twenty".