61108132820 has 96 divisors (see below), whose sum is σ = 153607104000. Its totient is φ = 19965648384.

The previous prime is 61108132793. The next prime is 61108132859. The reversal of 61108132820 is 2823180116.

61108132820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61108132820² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 830906 + ... + 901454.

It is an arithmetic number, because the mean of its divisors is an integer number (1600074000).

Almost surely, 2^61108132820 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 61108132820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76803552000).

61108132820 is an abundant number, since it is smaller than the sum of its proper divisors (92498971180).

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

61108132820 is a wasteful number, since it uses less digits than its factorization.

61108132820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70857 (or 70855 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 61108132820 in words is "sixty-one billion, one hundred eight million, one hundred thirty-two thousand, eight hundred twenty".