13123255304240 has 20 divisors (see below), whose sum is σ = 30511568582544. Its totient is φ = 5249302121664.

The previous prime is 13123255304233. The next prime is 13123255304279. The reversal of 13123255304240 is 4240355232131.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 13123255304240.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82020345572 + ... + 82020345731.

Almost surely, 2^{13123255304240} is an apocalyptic number.

13123255304240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13123255304240 is an abundant number, since it is smaller than the sum of its proper divisors (17388313278304).

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

13123255304240 is a wasteful number, since it uses less digits than its factorization.

13123255304240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164040691316 (or 164040691310 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 13123255304240 in words is "thirteen trillion, one hundred twenty-three billion, two hundred fifty-five million, three hundred four thousand, two hundred forty".