402479854569 has 27 divisors (see below), whose sum is σ = 629558474103. Its totient is φ = 247664684592.

The previous prime is 402479854549. The next prime is 402479854577. The reversal of 402479854569 is 965458974204.

The square root of 402479854569 is 634413.

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

402479854569 is a `hidden beast` number, since 4 + 0 + 24 + 7 + 9 + 8 + 545 + 69 = 666.

It can be written as a sum of positive squares in only one way, i.e., 59538440025 + 342941414544 = 244005^2 + 585612^2 .

It is not a de Polignac number, because 402479854569 - 2⁹ = 402479854057 is a prime.

It is a super-2 number, since 2×402479854569² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402479854519) 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, 24733974 + ... + 24750240.

Almost surely, 2^402479854569 is an apocalyptic number.

402479854569 is the 634413-rd square number.

402479854569 is the 317207-th centered octagonal number.

It is an amenable number.

402479854569 is a deficient number, since it is larger than the sum of its proper divisors (227078619534).

402479854569 is an frugal number, since it uses more digits than its factorization.

402479854569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32566 (or 16283 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 63.

The spelling of 402479854569 in words is "four hundred two billion, four hundred seventy-nine million, eight hundred fifty-four thousand, five hundred sixty-nine".