12505615501 has 4 divisors (see below), whose sum is σ = 12514049632. Its totient is φ = 12497181372.

The previous prime is 12505615483. The next prime is 12505615541. The reversal of 12505615501 is 10551650521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12505615501 - 2³¹ = 10358131853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12505615541) 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, 4214841 + ... + 4217806.

It is an arithmetic number, because the mean of its divisors is an integer number (3128512408).

Almost surely, 2^12505615501 is an apocalyptic number.

It is an amenable number.

12505615501 is a deficient number, since it is larger than the sum of its proper divisors (8434131).

12505615501 is an equidigital number, since it uses as much as digits as its factorization.

12505615501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8434130.

The product of its (nonzero) digits is 7500, while the sum is 31.

The spelling of 12505615501 in words is "twelve billion, five hundred five million, six hundred fifteen thousand, five hundred one".