123731266506 has 32 divisors (see below), whose sum is σ = 250343966400. Its totient is φ = 40765368960.

The previous prime is 123731266493. The next prime is 123731266517. The reversal of 123731266506 is 605662137321.

It is a super-2 number, since 2×123731266506² (a number of 23 digits) contains 22 as substring.

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, 36201 + ... + 498771.

It is an arithmetic number, because the mean of its divisors is an integer number (7823248950).

Almost surely, 2^123731266506 is an apocalyptic number.

123731266506 is an abundant number, since it is smaller than the sum of its proper divisors (126612699894).

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

123731266506 is a wasteful number, since it uses less digits than its factorization.

123731266506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463094.

The product of its (nonzero) digits is 272160, while the sum is 42.

The spelling of 123731266506 in words is "one hundred twenty-three billion, seven hundred thirty-one million, two hundred sixty-six thousand, five hundred six".