61734341658 has 64 divisors (see below), whose sum is σ = 139431352320. Its totient is φ = 18050155200.

The previous prime is 61734341621. The next prime is 61734341659. The reversal of 61734341658 is 85614343716.

It is a happy number.

It is a super-2 number, since 2×61734341658² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61734341659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3065763 + ... + 3085833.

It is an arithmetic number, because the mean of its divisors is an integer number (2178614880).

Almost surely, 2^61734341658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61734341658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69715676160).

61734341658 is an abundant number, since it is smaller than the sum of its proper divisors (77697010662).

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

61734341658 is a wasteful number, since it uses less digits than its factorization.

61734341658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21723.

The product of its digits is 1451520, while the sum is 48.

The spelling of 61734341658 in words is "sixty-one billion, seven hundred thirty-four million, three hundred forty-one thousand, six hundred fifty-eight".