61019090 has 48 divisors (see below), whose sum is σ = 121806720. Its totient is φ = 21991200.

The previous prime is 61019087. The next prime is 61019099. The reversal of 61019090 is 9091016.

61019090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61019099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255191 + ... + 255429.

It is an arithmetic number, because the mean of its divisors is an integer number (2537640).

Almost surely, 2^61019090 is an apocalyptic number.

61019090 is a deficient number, since it is larger than the sum of its proper divisors (60787630).

61019090 is a wasteful number, since it uses less digits than its factorization.

61019090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 61019090 is about 7811.4716923253. The cubic root of 61019090 is about 393.6907783613.

The spelling of 61019090 in words is "sixty-one million, nineteen thousand, ninety".