401216117523 has 24 divisors (see below), whose sum is σ = 579322851120. Its totient is φ = 246879959040.

The previous prime is 401216117509. The next prime is 401216117593. The reversal of 401216117523 is 325711612104.

It is not a de Polignac number, because 401216117523 - 2¹³ = 401216109331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (401216117593) 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 23 ways as a sum of consecutive naturals, for example, 6931783 + ... + 6989423.

It is an arithmetic number, because the mean of its divisors is an integer number (24138452130).

Almost surely, 2^401216117523 is an apocalyptic number.

401216117523 is a deficient number, since it is larger than the sum of its proper divisors (178106733597).

401216117523 is a wasteful number, since it uses less digits than its factorization.

401216117523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71399 (or 71386 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

Adding to 401216117523 its reverse (325711612104), we get a palindrome (726927729627).

The spelling of 401216117523 in words is "four hundred one billion, two hundred sixteen million, one hundred seventeen thousand, five hundred twenty-three".