123767461636 has 81 divisors (see below), whose sum is σ = 272968432191. Its totient is φ = 48937621824.

The previous prime is 123767461579. The next prime is 123767461639. The reversal of 123767461636 is 636164767321.

The square root of 123767461636 is 351806.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5156101636 + 118611360000 = 71806^2 + 344400^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (123767461639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 64027726 + ... + 64029658.

Almost surely, 2^123767461636 is an apocalyptic number.

123767461636 is the 351806-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123767461636

123767461636 is an abundant number, since it is smaller than the sum of its proper divisors (149200970555).

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

123767461636 is an equidigital number, since it uses as much as digits as its factorization.

123767461636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910 (or 1955 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 52.

The spelling of 123767461636 in words is "one hundred twenty-three billion, seven hundred sixty-seven million, four hundred sixty-one thousand, six hundred thirty-six".