61481658 has 64 divisors (see below), whose sum is σ = 146488320. Its totient is φ = 16837632.

The previous prime is 61481621. The next prime is 61481659. The reversal of 61481658 is 85618416.

61481658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61481659) 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 31 ways as a sum of consecutive naturals, for example, 106266 + ... + 106842.

It is an arithmetic number, because the mean of its divisors is an integer number (2288880).

Almost surely, 2^61481658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61481658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73244160).

61481658 is an abundant number, since it is smaller than the sum of its proper divisors (85006662).

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

61481658 is a wasteful number, since it uses less digits than its factorization.

61481658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691.

The product of its digits is 46080, while the sum is 39.

The square root of 61481658 is about 7841.0240402641. The cubic root of 61481658 is about 394.6830935697.

The spelling of 61481658 in words is "sixty-one million, four hundred eighty-one thousand, six hundred fifty-eight".