61165880 has 32 divisors (see below), whose sum is σ = 138434400. Its totient is φ = 24322176.

The previous prime is 61165879. The next prime is 61165889. The reversal of 61165880 is 8856116.

It is a self number, because there is not a number n which added to its sum of digits gives 61165880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61165889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2501 + ... + 11339.

It is an arithmetic number, because the mean of its divisors is an integer number (4326075).

Almost surely, 2^61165880 is an apocalyptic number.

It is an amenable number.

61165880 is an abundant number, since it is smaller than the sum of its proper divisors (77268520).

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

61165880 is a wasteful number, since it uses less digits than its factorization.

61165880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9023 (or 9019 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 61165880 is about 7820.8618450910. The cubic root of 61165880 is about 394.0062183907.

The spelling of 61165880 in words is "sixty-one million, one hundred sixty-five thousand, eight hundred eighty".