123547116545 has 16 divisors (see below), whose sum is σ = 149120040960. Its totient is φ = 98262288384.

The previous prime is 123547116499. The next prime is 123547116547. The reversal of 123547116545 is 545611745321.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123547116545 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123547116496 and 123547116505.

It is not an unprimeable number, because it can be changed into a prime (123547116547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4454912 + ... + 4482558.

It is an arithmetic number, because the mean of its divisors is an integer number (9320002560).

Almost surely, 2^123547116545 is an apocalyptic number.

It is an amenable number.

123547116545 is a deficient number, since it is larger than the sum of its proper divisors (25572924415).

123547116545 is a wasteful number, since it uses less digits than its factorization.

123547116545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32824.

The product of its digits is 504000, while the sum is 44.

The spelling of 123547116545 in words is "one hundred twenty-three billion, five hundred forty-seven million, one hundred sixteen thousand, five hundred forty-five".