401985320867 has 8 divisors (see below), whose sum is σ = 433433291424. Its totient is φ = 370612496448.

The previous prime is 401985320833. The next prime is 401985320887. The reversal of 401985320867 is 768023589104.

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

It is a cyclic number.

It is not a de Polignac number, because 401985320867 - 2¹² = 401985316771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401985320827) 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, 18775418 + ... + 18796815.

It is an arithmetic number, because the mean of its divisors is an integer number (54179161428).

It is a 1-persistent number, because it is pandigital, but 2⋅401985320867 = 803970641734 is not.

Almost surely, 2^401985320867 is an apocalyptic number.

401985320867 is a deficient number, since it is larger than the sum of its proper divisors (31447970557).

401985320867 is a wasteful number, since it uses less digits than its factorization.

401985320867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37573069.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 401985320867 in words is "four hundred one billion, nine hundred eighty-five million, three hundred twenty thousand, eight hundred sixty-seven".