123536536407 has 24 divisors (see below), whose sum is σ = 181025470080. Its totient is φ = 81166070160.

The previous prime is 123536536339. The next prime is 123536536421. The reversal of 123536536407 is 704635635321.

It is a happy number.

123536536407 is a `hidden beast` number, since 1 + 2 + 3 + 536 + 53 + 64 + 0 + 7 = 666.

It is not a de Polignac number, because 123536536407 - 2¹² = 123536532311 is a prime.

It is a super-2 number, since 2×123536536407² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123536536007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1662748 + ... + 1735454.

It is an arithmetic number, because the mean of its divisors is an integer number (7542727920).

Almost surely, 2^123536536407 is an apocalyptic number.

123536536407 is a deficient number, since it is larger than the sum of its proper divisors (57488933673).

123536536407 is a wasteful number, since it uses less digits than its factorization.

123536536407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75443 (or 75440 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 45.

The spelling of 123536536407 in words is "one hundred twenty-three billion, five hundred thirty-six million, five hundred thirty-six thousand, four hundred seven".