123640605622 has 4 divisors (see below), whose sum is σ = 185460908436. Its totient is φ = 61820302810.

The previous prime is 123640605581. The next prime is 123640605631. The reversal of 123640605622 is 226506046321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 226506046321 = 19 ⋅11921370859.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30910151404 + ... + 30910151407.

It is an arithmetic number, because the mean of its divisors is an integer number (46365227109).

Almost surely, 2^123640605622 is an apocalyptic number.

123640605622 is a deficient number, since it is larger than the sum of its proper divisors (61820302814).

123640605622 is an equidigital number, since it uses as much as digits as its factorization.

123640605622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61820302813.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 123640605622 in words is "one hundred twenty-three billion, six hundred forty million, six hundred five thousand, six hundred twenty-two".