61716532500 has 720 divisors, whose sum is σ = 241473103872. Its totient is φ = 13471920000.

The previous prime is 61716532499. The next prime is 61716532519. The reversal of 61716532500 is 523561716.

61716532500 is a `hidden beast` number, since 6 + 1 + 71 + 6 + 532 + 50 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 97807185 + ... + 97807815.

Almost surely, 2^61716532500 is an apocalyptic number.

61716532500 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 61716532500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120736551936).

61716532500 is an abundant number, since it is smaller than the sum of its proper divisors (179756571372).

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

61716532500 is a wasteful number, since it uses less digits than its factorization.

61716532500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The spelling of 61716532500 in words is "sixty-one billion, seven hundred sixteen million, five hundred thirty-two thousand, five hundred".