402871626797 has 4 divisors (see below), whose sum is σ = 410472978300. Its totient is φ = 395270275296.

The previous prime is 402871626791. The next prime is 402871626811. The reversal of 402871626797 is 797626178204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 343279981801 + 59591644996 = 585901^2 + 244114^2 .

It is a cyclic number.

It is not a de Polignac number, because 402871626797 - 2³⁰ = 401797884973 is a prime.

It is a super-2 number, since 2×402871626797² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402871626791) 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 3 ways as a sum of consecutive naturals, for example, 3800675672 + ... + 3800675777.

It is an arithmetic number, because the mean of its divisors is an integer number (102618244575).

Almost surely, 2^402871626797 is an apocalyptic number.

It is an amenable number.

402871626797 is a deficient number, since it is larger than the sum of its proper divisors (7601351503).

402871626797 is an equidigital number, since it uses as much as digits as its factorization.

402871626797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7601351502.

The product of its (nonzero) digits is 14224896, while the sum is 59.

The spelling of 402871626797 in words is "four hundred two billion, eight hundred seventy-one million, six hundred twenty-six thousand, seven hundred ninety-seven".