61165949 has 16 divisors (see below), whose sum is σ = 70943040. Its totient is φ = 52227840.

The previous prime is 61165943. The next prime is 61165957. The reversal of 61165949 is 94956116.

It is a cyclic number.

It is not a de Polignac number, because 61165949 - 2⁴ = 61165933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61165943) 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, 10694 + ... + 15384.

It is an arithmetic number, because the mean of its divisors is an integer number (4433940).

Almost surely, 2^61165949 is an apocalyptic number.

It is an amenable number.

61165949 is a deficient number, since it is larger than the sum of its proper divisors (9777091).

61165949 is a wasteful number, since it uses less digits than its factorization.

61165949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4780.

The product of its digits is 58320, while the sum is 41.

The square root of 61165949 is about 7820.8662563683. The cubic root of 61165949 is about 394.0063665475.

The spelling of 61165949 in words is "sixty-one million, one hundred sixty-five thousand, nine hundred forty-nine".