12555426601 has 9 divisors (see below), whose sum is σ = 12708177751. Its totient is φ = 12404493904.

The previous prime is 12555426589. The next prime is 12555426617. The reversal of 12555426601 is 10662455521.

The square root of 12555426601 is 112051.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2410908201 + 10144518400 = 49101^2 + 100720^2 .

It is not a de Polignac number, because 12555426601 - 2¹⁹ = 12554902313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12555426701) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9971910 + ... + 9973168.

Almost surely, 2^12555426601 is an apocalyptic number.

12555426601 is the 112051-st square number.

12555426601 is the 56026-th centered octagonal number.

It is an amenable number.

12555426601 is a deficient number, since it is larger than the sum of its proper divisors (152751150).

12555426601 is an frugal number, since it uses more digits than its factorization.

12555426601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696 (or 1348 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 12555426601 in words is "twelve billion, five hundred fifty-five million, four hundred twenty-six thousand, six hundred one".