122387617638 has 96 divisors (see below), whose sum is σ = 318777338880. Its totient is φ = 33438121920.

The previous prime is 122387617631. The next prime is 122387617663. The reversal of 122387617638 is 836716783221.

It is a happy number.

122387617638 is a `hidden beast` number, since 12 + 2 + 3 + 8 + 7 + 617 + 6 + 3 + 8 = 666.

It is a super-2 number, since 2×122387617638² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122387617631) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 442198 + ... + 663561.

It is an arithmetic number, because the mean of its divisors is an integer number (3320597280).

Almost surely, 2^122387617638 is an apocalyptic number.

122387617638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

122387617638 is an abundant number, since it is smaller than the sum of its proper divisors (196389721242).

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

122387617638 is a wasteful number, since it uses less digits than its factorization.

122387617638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105834 (or 1105831 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The spelling of 122387617638 in words is "one hundred twenty-two billion, three hundred eighty-seven million, six hundred seventeen thousand, six hundred thirty-eight".