402540356162165 has 16 divisors (see below), whose sum is σ = 520352908377456. Its totient is φ = 297176622336000.

The previous prime is 402540356162123. The next prime is 402540356162171. The reversal of 402540356162165 is 561261653045204.

It can be written as a sum of positive squares in 8 ways, for example, as 123739660611889 + 278800695550276 = 11123833^2 + 16697326^2 .

It is not a de Polignac number, because 402540356162165 - 2¹⁸ = 402540355900021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 874230236 + ... + 874690565.

It is an arithmetic number, because the mean of its divisors is an integer number (32522056773591).

Almost surely, 2^{402540356162165} is an apocalyptic number.

It is an amenable number.

402540356162165 is a deficient number, since it is larger than the sum of its proper divisors (117812552215291).

402540356162165 is a wasteful number, since it uses less digits than its factorization.

402540356162165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748924360.

The product of its (nonzero) digits is 5184000, while the sum is 50.

The spelling of 402540356162165 in words is "four hundred two trillion, five hundred forty billion, three hundred fifty-six million, one hundred sixty-two thousand, one hundred sixty-five".