61809472332 has 108 divisors (see below), whose sum is σ = 164051128360. Its totient is φ = 20125175904.

The previous prime is 61809472313. The next prime is 61809472343. The reversal of 61809472332 is 23327490816.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

61809472332 is a `hidden beast` number, since 618 + 0 + 9 + 4 + 7 + 23 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (108).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 121432894 + ... + 121433402.

Almost surely, 2^61809472332 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 61809472332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82025564180).

61809472332 is an abundant number, since it is smaller than the sum of its proper divisors (102241656028).

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

61809472332 is an equidigital number, since it uses as much as digits as its factorization.

61809472332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 61809472332 in words is "sixty-one billion, eight hundred nine million, four hundred seventy-two thousand, three hundred thirty-two".