61173361340 has 192 divisors, whose sum is σ = 168901334784. Its totient is φ = 18059231232.

The previous prime is 61173361261. The next prime is 61173361363. The reversal of 61173361340 is 4316337116.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 61173361340.

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, 3487472 + ... + 3504968.

It is an arithmetic number, because the mean of its divisors is an integer number (879694452).

Almost surely, 2^61173361340 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 61173361340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84450667392).

61173361340 is an abundant number, since it is smaller than the sum of its proper divisors (107727973444).

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

61173361340 is a wasteful number, since it uses less digits than its factorization.

61173361340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17656 (or 17654 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

Adding to 61173361340 its reverse (4316337116), we get a palindrome (65489698456).

The spelling of 61173361340 in words is "sixty-one billion, one hundred seventy-three million, three hundred sixty-one thousand, three hundred forty".