402156668361 has 16 divisors (see below), whose sum is σ = 621204823424. Its totient is φ = 226655812224.

The previous prime is 402156668359. The next prime is 402156668363. The reversal of 402156668361 is 163866651204.

It is an interprime number because it is at equal distance from previous prime (402156668359) and next prime (402156668363).

It is not a de Polignac number, because 402156668361 - 2¹ = 402156668359 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 402156668361.

It is not an unprimeable number, because it can be changed into a prime (402156668363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131165026 + ... + 131168091.

It is an arithmetic number, because the mean of its divisors is an integer number (38825301464).

Almost surely, 2^402156668361 is an apocalyptic number.

It is an amenable number.

402156668361 is a deficient number, since it is larger than the sum of its proper divisors (219048155063).

402156668361 is a wasteful number, since it uses less digits than its factorization.

402156668361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262333200.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 402156668361 in words is "four hundred two billion, one hundred fifty-six million, six hundred sixty-eight thousand, three hundred sixty-one".