61111090 has 16 divisors (see below), whose sum is σ = 116470872. Its totient is φ = 23006464.

The previous prime is 61111031. The next prime is 61111103. The reversal of 61111090 is 9011116.

It can be written as a sum of positive squares in 4 ways, for example, as 61042969 + 68121 = 7813^2 + 261^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179569 + ... + 179908.

Almost surely, 2^61111090 is an apocalyptic number.

61111090 is a deficient number, since it is larger than the sum of its proper divisors (55359782).

61111090 is a wasteful number, since it uses less digits than its factorization.

61111090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359501.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 61111090 is about 7817.3582494344. The cubic root of 61111090 is about 393.8885381323. Note that the first 3 decimals are identical.

The spelling of 61111090 in words is "sixty-one million, one hundred eleven thousand, ninety".