61222906724 has 18 divisors (see below), whose sum is σ = 124632346230. Its totient is φ = 26238388512.

The previous prime is 61222906711. The next prime is 61222906729. The reversal of 61222906724 is 42760922216.

It can be written as a sum of positive squares in only one way, i.e., 60712960000 + 509946724 = 246400^2 + 22582^2 .

It is not an unprimeable number, because it can be changed into a prime (61222906729) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 156180689 + ... + 156181080.

It is an arithmetic number, because the mean of its divisors is an integer number (6924019235).

Almost surely, 2^61222906724 is an apocalyptic number.

It is an amenable number.

61222906724 is an abundant number, since it is smaller than the sum of its proper divisors (63409439506).

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

61222906724 is a wasteful number, since it uses less digits than its factorization.

61222906724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312361787 (or 312361778 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 61222906724 in words is "sixty-one billion, two hundred twenty-two million, nine hundred six thousand, seven hundred twenty-four".