122666781550 has 48 divisors (see below), whose sum is σ = 233623328400. Its totient is φ = 47893386240.

The previous prime is 122666781541. The next prime is 122666781569. The reversal of 122666781550 is 55187666221.

It is a junction number, because it is equal to n+sod(n) for n = 122666781494 and 122666781503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3311934 + ... + 3348766.

It is an arithmetic number, because the mean of its divisors is an integer number (4867152675).

Almost surely, 2^122666781550 is an apocalyptic number.

122666781550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122666781550 is a deficient number, since it is larger than the sum of its proper divisors (110956546850).

122666781550 is a wasteful number, since it uses less digits than its factorization.

122666781550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38437 (or 38432 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 122666781550 in words is "one hundred twenty-two billion, six hundred sixty-six million, seven hundred eighty-one thousand, five hundred fifty".