12542638435 has 8 divisors (see below), whose sum is σ = 15843332880. Its totient is φ = 9505999584.

The previous prime is 12542638363. The next prime is 12542638441. The reversal of 12542638435 is 53483624521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12542638435 - 2⁹ = 12542637923 is a prime.

It is a super-2 number, since 2×12542638435² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12542638391 and 12542638400.

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, 66013792 + ... + 66013981.

It is an arithmetic number, because the mean of its divisors is an integer number (1980416610).

Almost surely, 2^12542638435 is an apocalyptic number.

12542638435 is a deficient number, since it is larger than the sum of its proper divisors (3300694445).

12542638435 is a wasteful number, since it uses less digits than its factorization.

12542638435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132027797.

The product of its digits is 691200, while the sum is 43.

The spelling of 12542638435 in words is "twelve billion, five hundred forty-two million, six hundred thirty-eight thousand, four hundred thirty-five".