61206731100 has 432 divisors, whose sum is σ = 210120718080. Its totient is φ = 14849049600.

The previous prime is 61206731041. The next prime is 61206731137. The reversal of 61206731100 is 113760216.

61206731100 is a `hidden beast` number, since 612 + 0 + 6 + 7 + 31 + 10 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 46973049 + ... + 46974351.

Almost surely, 2^61206731100 is an apocalyptic number.

61206731100 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 61206731100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105060359040).

61206731100 is an abundant number, since it is smaller than the sum of its proper divisors (148913986980).

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

61206731100 is a wasteful number, since it uses less digits than its factorization.

61206731100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450 (or 1440 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The spelling of 61206731100 in words is "sixty-one billion, two hundred six million, seven hundred thirty-one thousand, one hundred".