402516320123 has 4 divisors (see below), whose sum is σ = 402519421608. Its totient is φ = 402513218640.

The previous prime is 402516320119. The next prime is 402516320191. The reversal of 402516320123 is 321023615204.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 402516320123 - 2² = 402516320119 is a prime.

It is a super-2 number, since 2×402516320123² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402516326123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1347161 + ... + 1618602.

It is an arithmetic number, because the mean of its divisors is an integer number (100629855402).

Almost surely, 2^402516320123 is an apocalyptic number.

402516320123 is a deficient number, since it is larger than the sum of its proper divisors (3101485).

402516320123 is a wasteful number, since it uses less digits than its factorization.

402516320123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101484.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 402516320123 its reverse (321023615204), we get a palindrome (723539935327).

The spelling of 402516320123 in words is "four hundred two billion, five hundred sixteen million, three hundred twenty thousand, one hundred twenty-three".