123585089620 has 24 divisors (see below), whose sum is σ = 259579780488. Its totient is φ = 49424304000.

The previous prime is 123585089603. The next prime is 123585089647. The reversal of 123585089620 is 26980585321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16117825936 + 107467263684 = 126956^2 + 327822^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503671 + ... + 707710.

It is an arithmetic number, because the mean of its divisors is an integer number (10815824187).

Almost surely, 2^123585089620 is an apocalyptic number.

123585089620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123585089620 is an abundant number, since it is smaller than the sum of its proper divisors (135994690868).

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

123585089620 is a wasteful number, since it uses less digits than its factorization.

123585089620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216491 (or 1216489 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 123585089620 in words is "one hundred twenty-three billion, five hundred eighty-five million, eighty-nine thousand, six hundred twenty".