12501463665 has 16 divisors (see below), whose sum is σ = 20005486848. Its totient is φ = 6666398976.

The previous prime is 12501463619. The next prime is 12501463679. The reversal of 12501463665 is 56636410521.

It is not a de Polignac number, because 12501463665 - 2⁷ = 12501463537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38377 + ... + 162713.

It is an arithmetic number, because the mean of its divisors is an integer number (1250342928).

Almost surely, 2^12501463665 is an apocalyptic number.

12501463665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12501463665 is a deficient number, since it is larger than the sum of its proper divisors (7504023183).

12501463665 is a wasteful number, since it uses less digits than its factorization.

12501463665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131048.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 12501463665 in words is "twelve billion, five hundred one million, four hundred sixty-three thousand, six hundred sixty-five".