61111149 has 16 divisors (see below), whose sum is σ = 91955520. Its totient is φ = 35759360.

The previous prime is 61111133. The next prime is 61111159. The reversal of 61111149 is 94111116.

It is a cyclic number.

It is not a de Polignac number, because 61111149 - 2⁴ = 61111133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61111129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30972 + ... + 32885.

It is an arithmetic number, because the mean of its divisors is an integer number (5747220).

Almost surely, 2^61111149 is an apocalyptic number.

It is an amenable number.

61111149 is a deficient number, since it is larger than the sum of its proper divisors (30844371).

61111149 is a wasteful number, since it uses less digits than its factorization.

61111149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63900.

The product of its digits is 216, while the sum is 24.

The square root of 61111149 is about 7817.3620230868. The cubic root of 61111149 is about 393.8886648928. Note that the first 3 decimals are identical.

It can be divided in two parts, 6111 and 1149, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 61111149 in words is "sixty-one million, one hundred eleven thousand, one hundred forty-nine".