12345771523 has 8 divisors (see below), whose sum is σ = 12435152400. Its totient is φ = 12256477920.

The previous prime is 12345771481. The next prime is 12345771541. The reversal of 12345771523 is 32517754321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12345771523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12345771923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276808 + ... + 318298.

It is an arithmetic number, because the mean of its divisors is an integer number (1554394050).

Almost surely, 2^12345771523 is an apocalyptic number.

12345771523 is a deficient number, since it is larger than the sum of its proper divisors (89380877).

12345771523 is a wasteful number, since it uses less digits than its factorization.

12345771523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43637.

The product of its digits is 176400, while the sum is 40.

The spelling of 12345771523 in words is "twelve billion, three hundred forty-five million, seven hundred seventy-one thousand, five hundred twenty-three".