1878317825605 has 16 divisors (see below), whose sum is σ = 2427458632704. Its totient is φ = 1387011723840.

The previous prime is 1878317825509. The next prime is 1878317825621. The reversal of 1878317825605 is 5065287138781.

It is a happy number.

It is not a de Polignac number, because 1878317825605 - 2⁷ = 1878317825477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1171362 + ... + 2264668.

It is an arithmetic number, because the mean of its divisors is an integer number (151716164544).

Almost surely, 2^{1878317825605} is an apocalyptic number.

It is an amenable number.

1878317825605 is a deficient number, since it is larger than the sum of its proper divisors (549140807099).

1878317825605 is a wasteful number, since it uses less digits than its factorization.

1878317825605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119756.

The product of its (nonzero) digits is 22579200, while the sum is 61.

The spelling of 1878317825605 in words is "one trillion, eight hundred seventy-eight billion, three hundred seventeen million, eight hundred twenty-five thousand, six hundred five".