61461553 has 4 divisors (see below), whose sum is σ = 61526080. Its totient is φ = 61397028.

The previous prime is 61461541. The next prime is 61461559. The reversal of 61461553 is 35516416.

61461553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61461553 - 2¹³ = 61453361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61461559) by changing a digit.

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, 30813 + ... + 32746.

It is an arithmetic number, because the mean of its divisors is an integer number (15381520).

Almost surely, 2^61461553 is an apocalyptic number.

It is an amenable number.

61461553 is a deficient number, since it is larger than the sum of its proper divisors (64527).

61461553 is an equidigital number, since it uses as much as digits as its factorization.

61461553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64526.

The product of its digits is 10800, while the sum is 31.

The square root of 61461553 is about 7839.7418962616. The cubic root of 61461553 is about 394.6400673569.

Adding to 61461553 its reverse (35516416), we get a palindrome (96977969).

The spelling of 61461553 in words is "sixty-one million, four hundred sixty-one thousand, five hundred fifty-three".