61810542 has 24 divisors (see below), whose sum is σ = 138542040. Its totient is φ = 19892880.

The previous prime is 61810537. The next prime is 61810579. The reversal of 61810542 is 24501816.

61810542 is a `hidden beast` number, since 618 + 1 + 0 + 5 + 42 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 58684 + ... + 59727.

It is an arithmetic number, because the mean of its divisors is an integer number (5772585).

Almost surely, 2^61810542 is an apocalyptic number.

61810542 is an abundant number, since it is smaller than the sum of its proper divisors (76731498).

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

61810542 is a wasteful number, since it uses less digits than its factorization.

61810542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118448 (or 118445 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 61810542 is about 7861.9680742165. The cubic root of 61810542 is about 395.3856021923.

The spelling of 61810542 in words is "sixty-one million, eight hundred ten thousand, five hundred forty-two".