61554642 has 32 divisors (see below), whose sum is σ = 131539200. Its totient is φ = 19145808.

The previous prime is 61554613. The next prime is 61554707. The reversal of 61554642 is 24645516.

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 15 ways as a sum of consecutive naturals, for example, 3609 + ... + 11667.

It is an arithmetic number, because the mean of its divisors is an integer number (4110600).

Almost surely, 2^61554642 is an apocalyptic number.

61554642 is an abundant number, since it is smaller than the sum of its proper divisors (69984558).

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

61554642 is a wasteful number, since it uses less digits than its factorization.

61554642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8150.

The product of its digits is 28800, while the sum is 33.

The square root of 61554642 is about 7845.6766438593. The cubic root of 61554642 is about 394.8392060382.

The spelling of 61554642 in words is "sixty-one million, five hundred fifty-four thousand, six hundred forty-two".