61223781107 has 4 divisors (see below), whose sum is σ = 61266686376. Its totient is φ = 61180875840.

The previous prime is 61223781089. The next prime is 61223781131. The reversal of 61223781107 is 70118732216.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61223781107 - 2²⁰ = 61222732531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61223781137) 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 3 ways as a sum of consecutive naturals, for example, 21450494 + ... + 21453347.

It is an arithmetic number, because the mean of its divisors is an integer number (15316671594).

Almost surely, 2^61223781107 is an apocalyptic number.

61223781107 is a deficient number, since it is larger than the sum of its proper divisors (42905269).

61223781107 is a wasteful number, since it uses less digits than its factorization.

61223781107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42905268.

The product of its (nonzero) digits is 28224, while the sum is 38.

The spelling of 61223781107 in words is "sixty-one billion, two hundred twenty-three million, seven hundred eighty-one thousand, one hundred seven".