122547720406 has 4 divisors (see below), whose sum is σ = 183821580612. Its totient is φ = 61273860202.

The previous prime is 122547720377. The next prime is 122547720409. The reversal of 122547720406 is 604027745221.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122547720409) 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 as a sum of consecutive naturals, namely, 30636930100 + ... + 30636930103.

It is an arithmetic number, because the mean of its divisors is an integer number (45955395153).

Almost surely, 2^122547720406 is an apocalyptic number.

122547720406 is a deficient number, since it is larger than the sum of its proper divisors (61273860206).

122547720406 is an equidigital number, since it uses as much as digits as its factorization.

122547720406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61273860205.

The product of its (nonzero) digits is 188160, while the sum is 40.

The spelling of 122547720406 in words is "one hundred twenty-two billion, five hundred forty-seven million, seven hundred twenty thousand, four hundred six".