61155668 has 12 divisors (see below), whose sum is σ = 122311392. Its totient is φ = 26209560.

The previous prime is 61155667. The next prime is 61155671. The reversal of 61155668 is 86655116.

61155668 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61155667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1092038 + ... + 1092093.

It is an arithmetic number, because the mean of its divisors is an integer number (10192616).

Almost surely, 2^61155668 is an apocalyptic number.

It is an amenable number.

61155668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61155668 is a wasteful number, since it uses less digits than its factorization.

61155668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184142 (or 2184140 counting only the distinct ones).

The product of its digits is 43200, while the sum is 38.

The square root of 61155668 is about 7820.2089486151. The cubic root of 61155668 is about 393.9842899591.

The spelling of 61155668 in words is "sixty-one million, one hundred fifty-five thousand, six hundred sixty-eight".