1287627887500 has 36 divisors (see below), whose sum is σ = 2816505763344. Its totient is φ = 515051150000.

The previous prime is 1287627887467. The next prime is 1287627887509. The reversal of 1287627887500 is 57887267821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1287627887509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51492616 + ... + 51517615.

It is an arithmetic number, because the mean of its divisors is an integer number (78236271204).

Almost surely, 2^{1287627887500} is an apocalyptic number.

1287627887500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1287627887500 is an abundant number, since it is smaller than the sum of its proper divisors (1528877875844).

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

1287627887500 is an equidigital number, since it uses as much as digits as its factorization.

1287627887500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103010260 (or 103010238 counting only the distinct ones).

The product of its (nonzero) digits is 21073920, while the sum is 61.

The spelling of 1287627887500 in words is "one trillion, two hundred eighty-seven billion, six hundred twenty-seven million, eight hundred eighty-seven thousand, five hundred".