61122345128 has 64 divisors (see below), whose sum is σ = 123974519760. Its totient is φ = 28083879936.

The previous prime is 61122345091. The next prime is 61122345131. The reversal of 61122345128 is 82154322116.

It can be written as a sum of positive squares in 8 ways, for example, as 17599206244 + 43523138884 = 132662^2 + 208622^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42652700 + ... + 42654132.

Almost surely, 2^61122345128 is an apocalyptic number.

It is an amenable number.

61122345128 is an abundant number, since it is smaller than the sum of its proper divisors (62852174632).

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

61122345128 is a wasteful number, since it uses less digits than its factorization.

61122345128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3006 (or 3002 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The spelling of 61122345128 in words is "sixty-one billion, one hundred twenty-two million, three hundred forty-five thousand, one hundred twenty-eight".