61165171860 has 384 divisors, whose sum is σ = 197251891200. Its totient is φ = 14053478400.

The previous prime is 61165171843. The next prime is 61165171883. The reversal of 61165171860 is 6817156116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 102111841 + ... + 102112439.

It is an arithmetic number, because the mean of its divisors is an integer number (513676800).

Almost surely, 2^61165171860 is an apocalyptic number.

61165171860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61165171860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98625945600).

61165171860 is an abundant number, since it is smaller than the sum of its proper divisors (136086719340).

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

61165171860 is a wasteful number, since it uses less digits than its factorization.

61165171860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 42.

The spelling of 61165171860 in words is "sixty-one billion, one hundred sixty-five million, one hundred seventy-one thousand, eight hundred sixty".