61808702718 has 128 divisors (see below), whose sum is σ = 144986112000. Its totient is φ = 17203799808.

The previous prime is 61808702693. The next prime is 61808702743. The reversal of 61808702718 is 81720780816.

It is an interprime number because it is at equal distance from previous prime (61808702693) and next prime (61808702743).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 103186183 + ... + 103186781.

It is an arithmetic number, because the mean of its divisors is an integer number (1132704000).

Almost surely, 2^61808702718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61808702718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72493056000).

61808702718 is an abundant number, since it is smaller than the sum of its proper divisors (83177409282).

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

61808702718 is a wasteful number, since it uses less digits than its factorization.

61808702718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054.

The product of its (nonzero) digits is 301056, while the sum is 48.

The spelling of 61808702718 in words is "sixty-one billion, eight hundred eight million, seven hundred two thousand, seven hundred eighteen".