12145312554 has 16 divisors (see below), whose sum is σ = 24563554560. Its totient is φ = 4002949280.

The previous prime is 12145312537. The next prime is 12145312583. The reversal of 12145312554 is 45521354121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11371482 + ... + 11372549.

It is an arithmetic number, because the mean of its divisors is an integer number (1535222160).

Almost surely, 2^12145312554 is an apocalyptic number.

12145312554 is an abundant number, since it is smaller than the sum of its proper divisors (12418242006).

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

12145312554 is a wasteful number, since it uses less digits than its factorization.

12145312554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22744125.

The product of its digits is 24000, while the sum is 33.

Adding to 12145312554 its reverse (45521354121), we get a palindrome (57666666675).

The spelling of 12145312554 in words is "twelve billion, one hundred forty-five million, three hundred twelve thousand, five hundred fifty-four".