401655543529 has 8 divisors (see below), whose sum is σ = 402493458888. Its totient is φ = 400818495360.

The previous prime is 401655543517. The next prime is 401655543623. The reversal of 401655543529 is 925345556104.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 120200890000 + 281454653529 = 346700^2 + 530523^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401655543529 is a prime.

It is a super-2 number, since 2×401655543529² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401655543329) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 714669 + ... + 1146325.

It is an arithmetic number, because the mean of its divisors is an integer number (50311682361).

Almost surely, 2^401655543529 is an apocalyptic number.

It is an amenable number.

401655543529 is a deficient number, since it is larger than the sum of its proper divisors (837915359).

401655543529 is a wasteful number, since it uses less digits than its factorization.

401655543529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433595.

The product of its (nonzero) digits is 3240000, while the sum is 49.

The spelling of 401655543529 in words is "four hundred one billion, six hundred fifty-five million, five hundred forty-three thousand, five hundred twenty-nine".