61385090 has 16 divisors (see below), whose sum is σ = 118992888. Its totient is φ = 22665216.

The previous prime is 61385089. The next prime is 61385099. The reversal of 61385090 is 9058316.

It can be written as a sum of positive squares in 4 ways, for example, as 42523441 + 18861649 = 6521^2 + 4343^2 .

It is not an unprimeable number, because it can be changed into a prime (61385099) 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 7 ways as a sum of consecutive naturals, for example, 235967 + ... + 236226.

Almost surely, 2^61385090 is an apocalyptic number.

61385090 is a deficient number, since it is larger than the sum of its proper divisors (57607798).

61385090 is a wasteful number, since it uses less digits than its factorization.

61385090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472213.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 61385090 is about 7834.8637512084. The cubic root of 61385090 is about 394.4763450288.

The spelling of 61385090 in words is "sixty-one million, three hundred eighty-five thousand, ninety".