401261643055 has 128 divisors (see below), whose sum is σ = 633730406400. Its totient is φ = 236825856000.

The previous prime is 401261643053. The next prime is 401261643089. The reversal of 401261643055 is 550346162104.

It is not a de Polignac number, because 401261643055 - 2¹ = 401261643053 is a prime.

It is a super-2 number, since 2×401261643055² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401261643053) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 158037976 + ... + 158040514.

It is an arithmetic number, because the mean of its divisors is an integer number (4951018800).

Almost surely, 2^401261643055 is an apocalyptic number.

401261643055 is a deficient number, since it is larger than the sum of its proper divisors (232468763345).

401261643055 is a wasteful number, since it uses less digits than its factorization.

401261643055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 401261643055 in words is "four hundred one billion, two hundred sixty-one million, six hundred forty-three thousand, fifty-five".