402565551502 has 4 divisors (see below), whose sum is σ = 603848327256. Its totient is φ = 201282775750.

The previous prime is 402565551491. The next prime is 402565551551. The reversal of 402565551502 is 205155565204.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×402565551502² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100641387874 + ... + 100641387877.

It is an arithmetic number, because the mean of its divisors is an integer number (150962081814).

Almost surely, 2^402565551502 is an apocalyptic number.

402565551502 is a deficient number, since it is larger than the sum of its proper divisors (201282775754).

402565551502 is a wasteful number, since it uses less digits than its factorization.

402565551502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201282775753.

The product of its (nonzero) digits is 300000, while the sum is 40.

The spelling of 402565551502 in words is "four hundred two billion, five hundred sixty-five million, five hundred fifty-one thousand, five hundred two".