12551740426 has 4 divisors (see below), whose sum is σ = 18827610642. Its totient is φ = 6275870212.

The previous prime is 12551740379. The next prime is 12551740427. The reversal of 12551740426 is 62404715521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12398599801 + 153140625 = 111349^2 + 12375^2 .

It is a super-2 number, since 2×12551740426² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12551740427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3137935105 + ... + 3137935108.

Almost surely, 2^12551740426 is an apocalyptic number.

12551740426 is a deficient number, since it is larger than the sum of its proper divisors (6275870216).

12551740426 is an equidigital number, since it uses as much as digits as its factorization.

12551740426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6275870215.

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 12551740426 in words is "twelve billion, five hundred fifty-one million, seven hundred forty thousand, four hundred twenty-six".