123565560540 has 48 divisors (see below), whose sum is σ = 346616172672. Its totient is φ = 32890568256.

The previous prime is 123565560539. The next prime is 123565560553. The reversal of 123565560540 is 45065565321.

It is a junction number, because it is equal to n+sod(n) for n = 123565560492 and 123565560501.

It is a congruent number.

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, 1849654 + ... + 1915293.

It is an arithmetic number, because the mean of its divisors is an integer number (7221170264).

Almost surely, 2^123565560540 is an apocalyptic number.

123565560540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123565560540 is an abundant number, since it is smaller than the sum of its proper divisors (223050612132).

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

123565560540 is a wasteful number, since it uses less digits than its factorization.

123565560540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3765506 (or 3765504 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 42.

The spelling of 123565560540 in words is "one hundred twenty-three billion, five hundred sixty-five million, five hundred sixty thousand, five hundred forty".