402565551543 has 6 divisors (see below), whose sum is σ = 581483574464. Its totient is φ = 268377034356.

The previous prime is 402565551491. The next prime is 402565551551. The reversal of 402565551543 is 345155565204.

402565551543 is a `hidden beast` number, since 4 + 0 + 2 + 5 + 6 + 55 + 51 + 543 = 666.

It is not a de Polignac number, because 402565551543 - 2²⁵ = 402531997111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402565551593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22364752855 + ... + 22364752872.

Almost surely, 2^402565551543 is an apocalyptic number.

402565551543 is a deficient number, since it is larger than the sum of its proper divisors (178918022921).

402565551543 is a wasteful number, since it uses less digits than its factorization.

402565551543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44729505733 (or 44729505730 counting only the distinct ones).

The product of its (nonzero) digits is 1800000, while the sum is 45.

The spelling of 402565551543 in words is "four hundred two billion, five hundred sixty-five million, five hundred fifty-one thousand, five hundred forty-three".