61155534 has 32 divisors (see below), whose sum is σ = 135955584. Its totient is φ = 18181280.

The previous prime is 61155533. The next prime is 61155539. The reversal of 61155534 is 43555116.

61155534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61155533) 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, 5244 + ... + 12239.

It is an arithmetic number, because the mean of its divisors is an integer number (4248612).

Almost surely, 2^61155534 is an apocalyptic number.

61155534 is an abundant number, since it is smaller than the sum of its proper divisors (74800050).

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

61155534 is a wasteful number, since it uses less digits than its factorization.

61155534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17552.

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

The square root of 61155534 is about 7820.2003810644. The cubic root of 61155534 is about 393.9840022020.

The spelling of 61155534 in words is "sixty-one million, one hundred fifty-five thousand, five hundred thirty-four".