401234256664872 has 64 divisors (see below), whose sum is σ = 1024441569607680. Its totient is φ = 130897371164352.

The previous prime is 401234256664867. The next prime is 401234256664873. The reversal of 401234256664872 is 278466652432104.

It is not an unprimeable number, because it can be changed into a prime (401234256664873) 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, 83507193 + ... + 88181175.

It is an arithmetic number, because the mean of its divisors is an integer number (16006899525120).

Almost surely, 2^{401234256664872} is an apocalyptic number.

It is an amenable number.

401234256664872 is an abundant number, since it is smaller than the sum of its proper divisors (623207312942808).

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

401234256664872 is a wasteful number, since it uses less digits than its factorization.

401234256664872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4750142 (or 4750138 counting only the distinct ones).

The product of its (nonzero) digits is 92897280, while the sum is 60.

The spelling of 401234256664872 in words is "four hundred one trillion, two hundred thirty-four billion, two hundred fifty-six million, six hundred sixty-four thousand, eight hundred seventy-two".