61105491 has 6 divisors (see below), whose sum is σ = 88263500. Its totient is φ = 40736988.

The previous prime is 61105487. The next prime is 61105493. The reversal of 61105491 is 19450116.

61105491 is a `hidden beast` number, since 6 + 110 + 549 + 1 = 666.

61105491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61105491 - 2² = 61105487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61105493) 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 5 ways as a sum of consecutive naturals, for example, 3394741 + ... + 3394758.

Almost surely, 2^61105491 is an apocalyptic number.

61105491 is a deficient number, since it is larger than the sum of its proper divisors (27158009).

61105491 is a wasteful number, since it uses less digits than its factorization.

61105491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6789505 (or 6789502 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 61105491 is about 7817.0001279263. Note that the first 3 decimals coincide. The cubic root of 61105491 is about 393.8765084048.

The spelling of 61105491 in words is "sixty-one million, one hundred five thousand, four hundred ninety-one".