401812561276 has 24 divisors (see below), whose sum is σ = 806464803200. Its totient is φ = 171596880432.

The previous prime is 401812561273. The next prime is 401812561277. The reversal of 401812561276 is 672165218104.

It is a super-2 number, since 2×401812561276² (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 (401812561273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25346226 + ... + 25362073.

Almost surely, 2^401812561276 is an apocalyptic number.

It is an amenable number.

401812561276 is an abundant number, since it is smaller than the sum of its proper divisors (404652241924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401812561276 is a wasteful number, since it uses less digits than its factorization.

401812561276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50708593 (or 50708591 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 401812561276 in words is "four hundred one billion, eight hundred twelve million, five hundred sixty-one thousand, two hundred seventy-six".