401551237642455 has 24 divisors (see below), whose sum is σ = 706410535479792. Its totient is φ = 210964232312064.

The previous prime is 401551237642441. The next prime is 401551237642459. The reversal of 401551237642455 is 554246732155104.

401551237642455 is a `hidden beast` number, since 4 + 0 + 1 + 5 + 5 + 123 + 7 + 64 + 2 + 455 = 666.

It is not a de Polignac number, because 401551237642455 - 2⁹ = 401551237641943 is a prime.

It is a super-2 number, since 2×401551237642455² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401551237642459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66592242034 + ... + 66592248063.

It is an arithmetic number, because the mean of its divisors is an integer number (29433772311658).

Almost surely, 2^{401551237642455} is an apocalyptic number.

401551237642455 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

401551237642455 is a deficient number, since it is larger than the sum of its proper divisors (304859297837337).

401551237642455 is a wasteful number, since it uses less digits than its factorization.

401551237642455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133184490175 (or 133184490172 counting only the distinct ones).

The product of its (nonzero) digits is 20160000, while the sum is 54.

Adding to 401551237642455 its reverse (554246732155104), we get a palindrome (955797969797559).

The spelling of 401551237642455 in words is "four hundred one trillion, five hundred fifty-one billion, two hundred thirty-seven million, six hundred forty-two thousand, four hundred fifty-five".