61541553 has 16 divisors (see below), whose sum is σ = 83982080. Its totient is φ = 40075776.

The previous prime is 61541539. The next prime is 61541563. The reversal of 61541553 is 35514516.

61541553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61541553 - 2⁵ = 61541521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61541553.

It is not an unprimeable number, because it can be changed into a prime (61541563) 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 15 ways as a sum of consecutive naturals, for example, 21651 + ... + 24327.

It is an arithmetic number, because the mean of its divisors is an integer number (5248880).

Almost surely, 2^61541553 is an apocalyptic number.

It is an amenable number.

61541553 is a deficient number, since it is larger than the sum of its proper divisors (22440527).

61541553 is a wasteful number, since it uses less digits than its factorization.

61541553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856.

The product of its digits is 9000, while the sum is 30.

The square root of 61541553 is about 7844.8424458366. The cubic root of 61541553 is about 394.8112178067.

The spelling of 61541553 in words is "sixty-one million, five hundred forty-one thousand, five hundred fifty-three".