123422610640 has 40 divisors (see below), whose sum is σ = 327951509760. Its totient is φ = 42316323456.

The previous prime is 123422610637. The next prime is 123422610719. The reversal of 123422610640 is 46016224321.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 110198200 + ... + 110199319.

It is an arithmetic number, because the mean of its divisors is an integer number (8198787744).

Almost surely, 2^123422610640 is an apocalyptic number.

123422610640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123422610640 is an abundant number, since it is smaller than the sum of its proper divisors (204528899120).

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

123422610640 is a wasteful number, since it uses less digits than its factorization.

123422610640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220397539 (or 220397533 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 123422610640 its reverse (46016224321), we get a palindrome (169438834961).

The spelling of 123422610640 in words is "one hundred twenty-three billion, four hundred twenty-two million, six hundred ten thousand, six hundred forty".