61453520 has 20 divisors (see below), whose sum is σ = 142879620. Its totient is φ = 24581376.

The previous prime is 61453519. The next prime is 61453537. The reversal of 61453520 is 2535416.

61453520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 31990336 + 29463184 = 5656^2 + 5428^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 61453520.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384005 + ... + 384164.

It is an arithmetic number, because the mean of its divisors is an integer number (7143981).

Almost surely, 2^61453520 is an apocalyptic number.

It is an amenable number.

61453520 is an abundant number, since it is smaller than the sum of its proper divisors (81426100).

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

61453520 is a wasteful number, since it uses less digits than its factorization.

61453520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768182 (or 768176 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 61453520 is about 7839.2295539804. The cubic root of 61453520 is about 394.6228735090.

Adding to 61453520 its reverse (2535416), we get a palindrome (63988936).

The spelling of 61453520 in words is "sixty-one million, four hundred fifty-three thousand, five hundred twenty".