61222258164 has 24 divisors (see below), whose sum is σ = 143449649280. Its totient is φ = 20322031744.

The previous prime is 61222258073. The next prime is 61222258177. The reversal of 61222258164 is 46185222216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10670469 + ... + 10676204.

It is an arithmetic number, because the mean of its divisors is an integer number (5977068720).

Almost surely, 2^61222258164 is an apocalyptic number.

It is an amenable number.

61222258164 is an abundant number, since it is smaller than the sum of its proper divisors (82227391116).

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

61222258164 is a wasteful number, since it uses less digits than its factorization.

61222258164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21346919 (or 21346917 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The spelling of 61222258164 in words is "sixty-one billion, two hundred twenty-two million, two hundred fifty-eight thousand, one hundred sixty-four".