61222944445 has 16 divisors (see below), whose sum is σ = 79302488832. Its totient is φ = 45105871680.

The previous prime is 61222944439. The next prime is 61222944449. The reversal of 61222944445 is 54444922216.

It is a happy number.

It is not a de Polignac number, because 61222944445 - 2³ = 61222944437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61222944449) 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, 1064667 + ... + 1120696.

It is an arithmetic number, because the mean of its divisors is an integer number (4956405552).

Almost surely, 2^61222944445 is an apocalyptic number.

61222944445 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61222944445 is a deficient number, since it is larger than the sum of its proper divisors (18079544387).

61222944445 is a wasteful number, since it uses less digits than its factorization.

61222944445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185812.

The product of its digits is 552960, while the sum is 43.

The spelling of 61222944445 in words is "sixty-one billion, two hundred twenty-two million, nine hundred forty-four thousand, four hundred forty-five".