122665487990 has 16 divisors (see below), whose sum is σ = 223278755040. Its totient is φ = 48514889280.

The previous prime is 122665487927. The next prime is 122665487999. The reversal of 122665487990 is 99784566221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122665487999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68912306 + ... + 68914085.

It is an arithmetic number, because the mean of its divisors is an integer number (13954922190).

Almost surely, 2^122665487990 is an apocalyptic number.

122665487990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122665487990 is a deficient number, since it is larger than the sum of its proper divisors (100613267050).

122665487990 is a wasteful number, since it uses less digits than its factorization.

122665487990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137826487.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 122665487990 in words is "one hundred twenty-two billion, six hundred sixty-five million, four hundred eighty-seven thousand, nine hundred ninety".