61686888837500 has 72 divisors (see below), whose sum is σ = 134938161186192. Its totient is φ = 24673525200000.

The previous prime is 61686888837499. The next prime is 61686888837517. The reversal of 61686888837500 is 573888868616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 275225480 + ... + 275449520.

It is an arithmetic number, because the mean of its divisors is an integer number (1874141127586).

Almost surely, 2^{61686888837500} 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 61686888837500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67469080593096).

61686888837500 is an abundant number, since it is smaller than the sum of its proper divisors (73251272348692).

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

61686888837500 is a wasteful number, since it uses less digits than its factorization.

61686888837500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246097 (or 246075 counting only the distinct ones).

The product of its (nonzero) digits is 743178240, while the sum is 74.

The spelling of 61686888837500 in words is "sixty-one trillion, six hundred eighty-six billion, eight hundred eighty-eight million, eight hundred thirty-seven thousand, five hundred".