401662126561 has 8 divisors (see below), whose sum is σ = 404039835648. Its totient is φ = 399287280000.

The previous prime is 401662126559. The next prime is 401662126631. The reversal of 401662126561 is 165621266104.

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 401662126561 - 2¹ = 401662126559 is a prime.

It is a super-2 number, since 2×401662126561² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401662126531) 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, 433840 + ... + 995761.

It is an arithmetic number, because the mean of its divisors is an integer number (50504979456).

Almost surely, 2^401662126561 is an apocalyptic number.

It is an amenable number.

401662126561 is a deficient number, since it is larger than the sum of its proper divisors (2377709087).

401662126561 is a wasteful number, since it uses less digits than its factorization.

401662126561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431263.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 401662126561 in words is "four hundred one billion, six hundred sixty-two million, one hundred twenty-six thousand, five hundred sixty-one".