61085570 has 64 divisors (see below), whose sum is σ = 142490880. Its totient is φ = 18309888.

The previous prime is 61085567. The next prime is 61085579. The reversal of 61085570 is 7558016.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61085579) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 15524 + ... + 19056.

It is an arithmetic number, because the mean of its divisors is an integer number (2226420).

Almost surely, 2^61085570 is an apocalyptic number.

61085570 is an abundant number, since it is smaller than the sum of its proper divisors (81405310).

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

61085570 is a wasteful number, since it uses less digits than its factorization.

61085570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 61085570 is about 7815.7258140239. The cubic root of 61085570 is about 393.8337011948.

The spelling of 61085570 in words is "sixty-one million, eighty-five thousand, five hundred seventy".