402048569329 has 27 divisors (see below), whose sum is σ = 449998888171. Its totient is φ = 358936043840.

The previous prime is 402048569311. The next prime is 402048569383. The reversal of 402048569329 is 923965840204.

The square root of 402048569329 is 634073.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 376143023025 + 25905546304 = 613305^2 + 160952^2 .

It is a de Polignac number, because none of the positive numbers 2^k-402048569329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402048569309) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 411512889 + ... + 411513865.

Almost surely, 2^402048569329 is an apocalyptic number.

402048569329 is the 634073-rd square number.

402048569329 is the 317037-th centered octagonal number.

It is an amenable number.

402048569329 is a deficient number, since it is larger than the sum of its proper divisors (47950318842).

402048569329 is an frugal number, since it uses more digits than its factorization.

402048569329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094 (or 1047 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 402048569329 in words is "four hundred two billion, forty-eight million, five hundred sixty-nine thousand, three hundred twenty-nine".