12787117281330 has 128 divisors (see below), whose sum is σ = 37894253068800. Its totient is φ = 2750841999360.

The previous prime is 12787117281317. The next prime is 12787117281493. The reversal of 12787117281330 is 3318271178721.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 36374311 + ... + 36724170.

It is an arithmetic number, because the mean of its divisors is an integer number (296048852100).

Almost surely, 2^{12787117281330} is an apocalyptic number.

12787117281330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12787117281330 is an abundant number, since it is smaller than the sum of its proper divisors (25107135787470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12787117281330 is a wasteful number, since it uses less digits than its factorization.

12787117281330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73098529 (or 73098515 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 51.

The spelling of 12787117281330 in words is "twelve trillion, seven hundred eighty-seven billion, one hundred seventeen million, two hundred eighty-one thousand, three hundred thirty".