402555205121 has 8 divisors (see below), whose sum is σ = 423767728320. Its totient is φ = 381345222672.

The previous prime is 402555205093. The next prime is 402555205181. The reversal of 402555205121 is 121502555204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402555205121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402555205181) 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 7 ways as a sum of consecutive naturals, for example, 305570 + ... + 947883.

It is an arithmetic number, because the mean of its divisors is an integer number (52970966040).

Almost surely, 2^402555205121 is an apocalyptic number.

It is an amenable number.

402555205121 is a deficient number, since it is larger than the sum of its proper divisors (21212523199).

402555205121 is a wasteful number, since it uses less digits than its factorization.

402555205121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270375.

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 402555205121 in words is "four hundred two billion, five hundred fifty-five million, two hundred five thousand, one hundred twenty-one".