401527665 has 192 divisors, whose sum is σ = 948049920. Its totient is φ = 156608640.

The previous prime is 401527631. The next prime is 401527697. The reversal of 401527665 is 566725104.

It is a happy number.

It is not a de Polignac number, because 401527665 - 2⁶ = 401527601 is a prime.

It is a super-2 number, since 2×401527665² = 322448931520704450, which contains 22 as substring.

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 3752542 + ... + 3752648.

It is an arithmetic number, because the mean of its divisors is an integer number (4937760).

Almost surely, 2^401527665 is an apocalyptic number.

401527665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

401527665 is an abundant number, since it is smaller than the sum of its proper divisors (546522255).

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

401527665 is a wasteful number, since it uses less digits than its factorization.

401527665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 401527665 is about 20038.1552294616. The cubic root of 401527665 is about 737.7431024676.

The spelling of 401527665 in words is "four hundred one million, five hundred twenty-seven thousand, six hundred sixty-five".