12899454987 has 18 divisors (see below), whose sum is σ = 17985889236. Its totient is φ = 8222854200.

The previous prime is 12899454949. The next prime is 12899454989. The reversal of 12899454987 is 78945499821.

It is not a de Polignac number, because 12899454987 - 2¹⁵ = 12899422219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12899454989) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4523112 + ... + 4525962.

Almost surely, 2^12899454987 is an apocalyptic number.

12899454987 is a deficient number, since it is larger than the sum of its proper divisors (5086434249).

12899454987 is an frugal number, since it uses more digits than its factorization.

12899454987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751 (or 2877 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 66.

The spelling of 12899454987 in words is "twelve billion, eight hundred ninety-nine million, four hundred fifty-four thousand, nine hundred eighty-seven".