61124522250 has 128 divisors (see below), whose sum is σ = 169978798080. Its totient is φ = 14502696000.

The previous prime is 61124522233. The next prime is 61124522293. The reversal of 61124522250 is 5222542116.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 308931 + ... + 466569.

It is an arithmetic number, because the mean of its divisors is an integer number (1327959360).

Almost surely, 2^61124522250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61124522250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84989399040).

61124522250 is an abundant number, since it is smaller than the sum of its proper divisors (108854275830).

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

61124522250 is a wasteful number, since it uses less digits than its factorization.

61124522250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157717 (or 157707 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 61124522250 in words is "sixty-one billion, one hundred twenty-four million, five hundred twenty-two thousand, two hundred fifty".