123066631555 has 64 divisors (see below), whose sum is σ = 172290779136. Its totient is φ = 82656000000.

The previous prime is 123066631547. The next prime is 123066631561. The reversal of 123066631555 is 555136660321.

It is not a de Polignac number, because 123066631555 - 2³ = 123066631547 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 149898045 + ... + 149898865.

It is an arithmetic number, because the mean of its divisors is an integer number (2692043424).

Almost surely, 2^123066631555 is an apocalyptic number.

123066631555 is a deficient number, since it is larger than the sum of its proper divisors (49224147581).

123066631555 is a wasteful number, since it uses less digits than its factorization.

123066631555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348.

The product of its (nonzero) digits is 486000, while the sum is 43.

The spelling of 123066631555 in words is "one hundred twenty-three billion, sixty-six million, six hundred thirty-one thousand, five hundred fifty-five".