122664217640 has 16 divisors (see below), whose sum is σ = 275994489780. Its totient is φ = 49065687040.

The previous prime is 122664217609. The next prime is 122664217691. The reversal of 122664217640 is 46712466221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 108229156324 + 14435061316 = 328982^2 + 120146^2 .

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 3 ways as a sum of consecutive naturals, for example, 1533302681 + ... + 1533302760.

Almost surely, 2^122664217640 is an apocalyptic number.

122664217640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122664217640 is an abundant number, since it is smaller than the sum of its proper divisors (153330272140).

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

122664217640 is a wasteful number, since it uses less digits than its factorization.

122664217640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3066605452 (or 3066605448 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 122664217640 in words is "one hundred twenty-two billion, six hundred sixty-four million, two hundred seventeen thousand, six hundred forty".