61757538 has 8 divisors (see below), whose sum is σ = 123515088. Its totient is φ = 20585844.

The previous prime is 61757537. The next prime is 61757557. The reversal of 61757538 is 83575716.

61757538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

61757538 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 61757538.

It is not an unprimeable number, because it can be changed into a prime (61757533) 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, 5146456 + ... + 5146467.

It is an arithmetic number, because the mean of its divisors is an integer number (15439386).

Almost surely, 2^61757538 is an apocalyptic number.

61757538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61757538 is a wasteful number, since it uses less digits than its factorization.

61757538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10292928.

The product of its digits is 176400, while the sum is 42.

The square root of 61757538 is about 7858.5964395686. The cubic root of 61757538 is about 395.2725523736.

The spelling of 61757538 in words is "sixty-one million, seven hundred fifty-seven thousand, five hundred thirty-eight".