61106606172 has 96 divisors (see below), whose sum is σ = 165458280960. Its totient is φ = 19466092800.

The previous prime is 61106606159. The next prime is 61106606177. The reversal of 61106606172 is 27160660116.

61106606172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61106606177) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2973043 + ... + 2993525.

It is an arithmetic number, because the mean of its divisors is an integer number (1723523760).

Almost surely, 2^61106606172 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 61106606172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82729140480).

61106606172 is an abundant number, since it is smaller than the sum of its proper divisors (104351674788).

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

61106606172 is a wasteful number, since it uses less digits than its factorization.

61106606172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21720 (or 21712 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 61106606172 in words is "sixty-one billion, one hundred six million, six hundred six thousand, one hundred seventy-two".