61798716998656 has 297 divisors, whose sum is σ = 142095580283839. Its totient is φ = 26841335910400.

The previous prime is 61798716998591. The next prime is 61798716998671. The reversal of 61798716998656 is 65689961789716.

The square root of 61798716998656 is 7861216.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (88).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 63644404251 + ... + 63644405221.

Almost surely, 2^{61798716998656} is an apocalyptic number.

61798716998656 is the 7861216-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61798716998656

61798716998656 is an abundant number, since it is smaller than the sum of its proper divisors (80296863285183).

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

61798716998656 is an frugal number, since it uses more digits than its factorization.

61798716998656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030 (or 1007 counting only the distinct ones).

The product of its digits is 14814213120, while the sum is 88.

The spelling of 61798716998656 in words is "sixty-one trillion, seven hundred ninety-eight billion, seven hundred sixteen million, nine hundred ninety-eight thousand, six hundred fifty-six".