401878686415 has 8 divisors (see below), whose sum is σ = 482257985328. Its totient is φ = 321500574720.

The previous prime is 401878686413. The next prime is 401878686437. The reversal of 401878686415 is 514686878104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 401878686415 - 2¹ = 401878686413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401878686415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401878686413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 852495 + ... + 1237135.

It is an arithmetic number, because the mean of its divisors is an integer number (60282248166).

Almost surely, 2^401878686415 is an apocalyptic number.

401878686415 is a deficient number, since it is larger than the sum of its proper divisors (80379298913).

401878686415 is a wasteful number, since it uses less digits than its factorization.

401878686415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593609.

The product of its (nonzero) digits is 10321920, while the sum is 58.

The spelling of 401878686415 in words is "four hundred one billion, eight hundred seventy-eight million, six hundred eighty-six thousand, four hundred fifteen".