61122501888 has 144 divisors (see below), whose sum is σ = 186059400576. Its totient is φ = 17449943040.

The previous prime is 61122501883. The next prime is 61122501901. The reversal of 61122501888 is 88810522116.

61122501888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61122501883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8345268 + ... + 8352588.

Almost surely, 2^61122501888 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 61122501888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93029700288).

61122501888 is an abundant number, since it is smaller than the sum of its proper divisors (124936898688).

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

61122501888 is a wasteful number, since it uses less digits than its factorization.

61122501888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8900 (or 8886 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 42.

The spelling of 61122501888 in words is "sixty-one billion, one hundred twenty-two million, five hundred one thousand, eight hundred eighty-eight".