401878686396 has 48 divisors (see below), whose sum is σ = 1024671916800. Its totient is φ = 121578088320.

The previous prime is 401878686379. The next prime is 401878686397. The reversal of 401878686396 is 693686878104.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401878686397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2462281 + ... + 2620416.

It is an arithmetic number, because the mean of its divisors is an integer number (21347331600).

Almost surely, 2^401878686396 is an apocalyptic number.

It is an amenable number.

401878686396 is an abundant number, since it is smaller than the sum of its proper divisors (622793230404).

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

401878686396 is a wasteful number, since it uses less digits than its factorization.

401878686396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5083314 (or 5083312 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 66.

The spelling of 401878686396 in words is "four hundred one billion, eight hundred seventy-eight million, six hundred eighty-six thousand, three hundred ninety-six".