12988061787 has 4 divisors (see below), whose sum is σ = 17317415720. Its totient is φ = 8658707856.

The previous prime is 12988061767. The next prime is 12988061833. The reversal of 12988061787 is 78716088921.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12988061787 - 2⁸ = 12988061531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12988061767) 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, 2164676962 + ... + 2164676967.

It is an arithmetic number, because the mean of its divisors is an integer number (4329353930).

Almost surely, 2^12988061787 is an apocalyptic number.

12988061787 is a deficient number, since it is larger than the sum of its proper divisors (4329353933).

12988061787 is an equidigital number, since it uses as much as digits as its factorization.

12988061787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329353932.

The product of its (nonzero) digits is 2709504, while the sum is 57.

The spelling of 12988061787 in words is "twelve billion, nine hundred eighty-eight million, sixty-one thousand, seven hundred eighty-seven".