61485090 has 64 divisors (see below), whose sum is σ = 161326080. Its totient is φ = 14929920.

The previous prime is 61485043. The next prime is 61485091. The reversal of 61485090 is 9058416.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61485091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13866 + ... + 17754.

It is an arithmetic number, because the mean of its divisors is an integer number (2520720).

Almost surely, 2^61485090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61485090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80663040).

61485090 is an abundant number, since it is smaller than the sum of its proper divisors (99840990).

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

61485090 is a wasteful number, since it uses less digits than its factorization.

61485090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 61485090 is about 7841.2428861756. The cubic root of 61485090 is about 394.6904373707.

The spelling of 61485090 in words is "sixty-one million, four hundred eighty-five thousand, ninety".