61816090 has 16 divisors (see below), whose sum is σ = 127164672. Its totient is φ = 21194064.

The previous prime is 61816067. The next prime is 61816093. The reversal of 61816090 is 9061816.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61816093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441474 + ... + 441613.

It is an arithmetic number, because the mean of its divisors is an integer number (7947792).

Almost surely, 2^61816090 is an apocalyptic number.

61816090 is an abundant number, since it is smaller than the sum of its proper divisors (65348582).

61816090 is a wasteful number, since it uses less digits than its factorization.

61816090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883101.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 61816090 is about 7862.3209041606. The cubic root of 61816090 is about 395.3974315319.

The spelling of 61816090 in words is "sixty-one million, eight hundred sixteen thousand, ninety".