61166809152 has 196 divisors, whose sum is σ = 182830744320. Its totient is φ = 20294053632.

The previous prime is 61166809147. The next prime is 61166809159. The reversal of 61166809152 is 25190866116.

It is a junction number, because it is equal to n+sod(n) for n = 61166809098 and 61166809107.

It is not an unprimeable number, because it can be changed into a prime (61166809159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 10401349 + ... + 10407227.

It is an arithmetic number, because the mean of its divisors is an integer number (932809920).

Almost surely, 2^61166809152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61166809152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91415372160).

61166809152 is an abundant number, since it is smaller than the sum of its proper divisors (121663935168).

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

61166809152 is an equidigital number, since it uses as much as digits as its factorization.

61166809152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6132 (or 6107 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 61166809152 in words is "sixty-one billion, one hundred sixty-six million, eight hundred nine thousand, one hundred fifty-two".