401215128491 has 8 divisors (see below), whose sum is σ = 401777350368. Its totient is φ = 400653000000.

The previous prime is 401215128463. The next prime is 401215128533. The reversal of 401215128491 is 194821512104.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401215128491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401215128991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17111546 + ... + 17134976.

It is an arithmetic number, because the mean of its divisors is an integer number (50222168796).

Almost surely, 2^401215128491 is an apocalyptic number.

401215128491 is a deficient number, since it is larger than the sum of its proper divisors (562221877).

401215128491 is a wasteful number, since it uses less digits than its factorization.

401215128491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46693.

The product of its (nonzero) digits is 23040, while the sum is 38.

The spelling of 401215128491 in words is "four hundred one billion, two hundred fifteen million, one hundred twenty-eight thousand, four hundred ninety-one".