12550731653 has 4 divisors (see below), whose sum is σ = 12551786028. Its totient is φ = 12549677280.

The previous prime is 12550731629. The next prime is 12550731671. The reversal of 12550731653 is 35613705521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35613705521 = 79 ⋅450806399.

It can be written as a sum of positive squares in 2 ways, for example, as 8364382849 + 4186348804 = 91457^2 + 64702^2 .

It is a cyclic number.

It is not a de Polignac number, because 12550731653 - 2⁸ = 12550731397 is a prime.

It is a super-2 number, since 2×12550731653² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12550731623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509126 + ... + 533207.

It is an arithmetic number, because the mean of its divisors is an integer number (3137946507).

Almost surely, 2^12550731653 is an apocalyptic number.

It is an amenable number.

12550731653 is a deficient number, since it is larger than the sum of its proper divisors (1054375).

12550731653 is a wasteful number, since it uses less digits than its factorization.

12550731653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054374.

The product of its (nonzero) digits is 94500, while the sum is 38.

The spelling of 12550731653 in words is "twelve billion, five hundred fifty million, seven hundred thirty-one thousand, six hundred fifty-three".