61222922550 has 240 divisors, whose sum is σ = 173676821472. Its totient is φ = 15987456000.

The previous prime is 61222922503. The next prime is 61222922567. The reversal of 61222922550 is 5522922216.

It is a happy number.

61222922550 is a `hidden beast` number, since 6 + 12 + 2 + 2 + 92 + 2 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

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 119 ways as a sum of consecutive naturals, for example, 39677079 + ... + 39678621.

Almost surely, 2^61222922550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61222922550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86838410736).

61222922550 is an abundant number, since it is smaller than the sum of its proper divisors (112453898922).

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

61222922550 is a wasteful number, since it uses less digits than its factorization.

61222922550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765 (or 1751 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 61222922550 in words is "sixty-one billion, two hundred twenty-two million, nine hundred twenty-two thousand, five hundred fifty".