61110090 has 48 divisors (see below), whose sum is σ = 162771336. Its totient is φ = 15897600.

The previous prime is 61110089. The next prime is 61110107. The reversal of 61110090 is 9001116.

61110090 = 3494² + 3495² + ... + 3498².

It can be written as a sum of positive squares in 4 ways, for example, as 15992001 + 45118089 = 3999^2 + 6717^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4591 + ... + 11970.

Almost surely, 2^61110090 is an apocalyptic number.

61110090 is an abundant number, since it is smaller than the sum of its proper divisors (101661246).

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

61110090 is a wasteful number, since it uses less digits than its factorization.

61110090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16615 (or 16612 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 61110090 is about 7817.2942889468. The cubic root of 61110090 is about 393.8863896369.

It can be divided in two parts, 611 and 10090, that added together give a palindrome (10701).

The spelling of 61110090 in words is "sixty-one million, one hundred ten thousand, ninety".