61486247718 has 288 divisors, whose sum is σ = 164878380576. Its totient is φ = 17118646272.

The previous prime is 61486247699. The next prime is 61486247729. The reversal of 61486247718 is 81774268416.

61486247718 is a `hidden beast` number, since 6 + 1 + 4 + 8 + 624 + 7 + 7 + 1 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 196441530 + ... + 196441842.

It is an arithmetic number, because the mean of its divisors is an integer number (572494377).

Almost surely, 2^61486247718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61486247718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82439190288).

61486247718 is an abundant number, since it is smaller than the sum of its proper divisors (103392132858).

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

61486247718 is a wasteful number, since it uses less digits than its factorization.

61486247718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 511 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The spelling of 61486247718 in words is "sixty-one billion, four hundred eighty-six million, two hundred forty-seven thousand, seven hundred eighteen".