1288505525870 has 64 divisors (see below), whose sum is σ = 2430437011200. Its totient is φ = 491172864000.

The previous prime is 1288505525851. The next prime is 1288505525887. The reversal of 1288505525870 is 785255058821.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91655882 + ... + 91669938.

It is an arithmetic number, because the mean of its divisors is an integer number (37975578300).

Almost surely, 2^{1288505525870} is an apocalyptic number.

1288505525870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1288505525870 is a deficient number, since it is larger than the sum of its proper divisors (1141931485330).

1288505525870 is a wasteful number, since it uses less digits than its factorization.

1288505525870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18173.

The product of its (nonzero) digits is 8960000, while the sum is 56.

The spelling of 1288505525870 in words is "one trillion, two hundred eighty-eight billion, five hundred five million, five hundred twenty-five thousand, eight hundred seventy".