401566884813 has 12 divisors (see below), whose sum is σ = 595717841628. Its totient is φ = 260475816960.

The previous prime is 401566884791. The next prime is 401566884827. The reversal of 401566884813 is 318488665104.

401566884813 is a `hidden beast` number, since 4 + 0 + 156 + 6 + 8 + 8 + 481 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 359427827529 + 42139057284 = 599523^2 + 205278^2 .

It is not a de Polignac number, because 401566884813 - 2¹⁰ = 401566883789 is a prime.

It is a super-2 number, since 2×401566884813² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401566884813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401566884853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 602952948 + ... + 602953613.

It is an arithmetic number, because the mean of its divisors is an integer number (49643153469).

Almost surely, 2^401566884813 is an apocalyptic number.

It is an amenable number.

401566884813 is a deficient number, since it is larger than the sum of its proper divisors (194150956815).

401566884813 is a wasteful number, since it uses less digits than its factorization.

401566884813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205906604 (or 1205906601 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 401566884813 in words is "four hundred one billion, five hundred sixty-six million, eight hundred eighty-four thousand, eight hundred thirteen".