402015441623 has 4 divisors (see below), whose sum is σ = 402156453048. Its totient is φ = 401874430200.

The previous prime is 402015441613. The next prime is 402015441629. The reversal of 402015441623 is 326144510204.

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 402015441623 - 2⁸ = 402015441367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402015441623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402015441629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70501436 + ... + 70507137.

It is an arithmetic number, because the mean of its divisors is an integer number (100539113262).

Almost surely, 2^402015441623 is an apocalyptic number.

402015441623 is a deficient number, since it is larger than the sum of its proper divisors (141011425).

402015441623 is a wasteful number, since it uses less digits than its factorization.

402015441623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141011424.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 402015441623 its reverse (326144510204), we get a palindrome (728159951827).

The spelling of 402015441623 in words is "four hundred two billion, fifteen million, four hundred forty-one thousand, six hundred twenty-three".