61553118 has 32 divisors (see below), whose sum is σ = 134835840. Its totient is φ = 18577760.

The previous prime is 61553117. The next prime is 61553119. The reversal of 61553118 is 81135516.

It is an interprime number because it is at equal distance from previous prime (61553117) and next prime (61553119).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61553111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16021 + ... + 19487.

It is an arithmetic number, because the mean of its divisors is an integer number (4213620).

Almost surely, 2^61553118 is an apocalyptic number.

61553118 is an abundant number, since it is smaller than the sum of its proper divisors (73282722).

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

61553118 is a wasteful number, since it uses less digits than its factorization.

61553118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3752.

The product of its digits is 3600, while the sum is 30.

The square root of 61553118 is about 7845.5795197041. The cubic root of 61553118 is about 394.8359474705.

The spelling of 61553118 in words is "sixty-one million, five hundred fifty-three thousand, one hundred eighteen".