401985320834 has 16 divisors (see below), whose sum is σ = 622444381440. Its totient is φ = 194504183280.

The previous prime is 401985320833. The next prime is 401985320887. The reversal of 401985320834 is 438023589104.

It is not an unprimeable number, because it can be changed into a prime (401985320833) 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, 4613597 + ... + 4699919.

It is an arithmetic number, because the mean of its divisors is an integer number (38902773840).

Almost surely, 2^401985320834 is an apocalyptic number.

401985320834 is a deficient number, since it is larger than the sum of its proper divisors (220459060606).

401985320834 is a wasteful number, since it uses less digits than its factorization.

401985320834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161465.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 401985320834 in words is "four hundred one billion, nine hundred eighty-five million, three hundred twenty thousand, eight hundred thirty-four".