12621345375 has 16 divisors (see below), whose sum is σ = 21001919328. Its totient is φ = 6731384000.

The previous prime is 12621345367. The next prime is 12621345389. The reversal of 12621345375 is 57354312621.

It is not a de Polignac number, because 12621345375 - 2³ = 12621345367 is a prime.

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, 16828086 + ... + 16828835.

It is an arithmetic number, because the mean of its divisors is an integer number (1312619958).

Almost surely, 2^12621345375 is an apocalyptic number.

12621345375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12621345375 is a deficient number, since it is larger than the sum of its proper divisors (8380573953).

12621345375 is an equidigital number, since it uses as much as digits as its factorization.

12621345375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33656939 (or 33656929 counting only the distinct ones).

The product of its digits is 151200, while the sum is 39.

Adding to 12621345375 its reverse (57354312621), we get a palindrome (69975657996).

The spelling of 12621345375 in words is "twelve billion, six hundred twenty-one million, three hundred forty-five thousand, three hundred seventy-five".