401959565 has 16 divisors (see below), whose sum is σ = 553416192. Its totient is φ = 274550784.

The previous prime is 401959559. The next prime is 401959583. The reversal of 401959565 is 565959104.

It is a cyclic number.

It is not a de Polignac number, because 401959565 - 2¹⁰ = 401958541 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13349 + ... + 31338.

It is an arithmetic number, because the mean of its divisors is an integer number (34588512).

Almost surely, 2^401959565 is an apocalyptic number.

It is an amenable number.

401959565 is a deficient number, since it is larger than the sum of its proper divisors (151456627).

401959565 is a wasteful number, since it uses less digits than its factorization.

401959565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44956.

The product of its (nonzero) digits is 243000, while the sum is 44.

The square root of 401959565 is about 20048.9292731557. The cubic root of 401959565 is about 738.0075234922.

The spelling of 401959565 in words is "four hundred one million, nine hundred fifty-nine thousand, five hundred sixty-five".