61855088358 has 96 divisors (see below), whose sum is σ = 147908160000. Its totient is φ = 17188307136.

The previous prime is 61855088333. The next prime is 61855088359. The reversal of 61855088358 is 85388055816.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61855088298 and 61855088307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61855088359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1536268 + ... + 1576016.

It is an arithmetic number, because the mean of its divisors is an integer number (1540710000).

Almost surely, 2^61855088358 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61855088358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73954080000).

61855088358 is an abundant number, since it is smaller than the sum of its proper divisors (86053071642).

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

61855088358 is a wasteful number, since it uses less digits than its factorization.

61855088358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39914 (or 39907 counting only the distinct ones).

The product of its (nonzero) digits is 9216000, while the sum is 57.

The spelling of 61855088358 in words is "sixty-one billion, eight hundred fifty-five million, eighty-eight thousand, three hundred fifty-eight".