6818400508415 has 16 divisors (see below), whose sum is σ = 8352848463840. Its totient is φ = 5341663029120.

The previous prime is 6818400508393. The next prime is 6818400508429. The reversal of 6818400508415 is 5148050048186.

It is not a de Polignac number, because 6818400508415 - 2⁶ = 6818400508351 is a prime.

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, 49171760 + ... + 49310229.

It is an arithmetic number, because the mean of its divisors is an integer number (522053028990).

Almost surely, 2^{6818400508415} is an apocalyptic number.

6818400508415 is a deficient number, since it is larger than the sum of its proper divisors (1534447955425).

6818400508415 is a wasteful number, since it uses less digits than its factorization.

6818400508415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98482282.

The product of its (nonzero) digits is 1228800, while the sum is 50.

The spelling of 6818400508415 in words is "six trillion, eight hundred eighteen billion, four hundred million, five hundred eight thousand, four hundred fifteen".