61505642 has 16 divisors (see below), whose sum is σ = 100786464. Its totient is φ = 27918000.

The previous prime is 61505623. The next prime is 61505651. The reversal of 61505642 is 24650516.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19217 + ... + 22187.

It is an arithmetic number, because the mean of its divisors is an integer number (6299154).

Almost surely, 2^61505642 is an apocalyptic number.

61505642 is a deficient number, since it is larger than the sum of its proper divisors (39280822).

61505642 is a wasteful number, since it uses less digits than its factorization.

61505642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3925.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 61505642 is about 7842.5532832108. The cubic root of 61505642 is about 394.7344088670.

The spelling of 61505642 in words is "sixty-one million, five hundred five thousand, six hundred forty-two".