123621642755 has 16 divisors (see below), whose sum is σ = 160393703904. Its totient is φ = 90926112000.

The previous prime is 123621642721. The next prime is 123621642803. The reversal of 123621642755 is 557246126321.

It is not a de Polignac number, because 123621642755 - 2⁸ = 123621642499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3772274 + ... + 3804903.

It is an arithmetic number, because the mean of its divisors is an integer number (10024606494).

Almost surely, 2^123621642755 is an apocalyptic number.

123621642755 is a deficient number, since it is larger than the sum of its proper divisors (36772061149).

123621642755 is a wasteful number, since it uses less digits than its factorization.

123621642755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7577446.

The product of its digits is 604800, while the sum is 44.

The spelling of 123621642755 in words is "one hundred twenty-three billion, six hundred twenty-one million, six hundred forty-two thousand, seven hundred fifty-five".