402039040465 has 16 divisors (see below), whose sum is σ = 487167782400. Its totient is φ = 318484418112.

The previous prime is 402039040441. The next prime is 402039040471. The reversal of 402039040465 is 564040930204.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 402039040465 - 2²¹ = 402036943313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10156131 + ... + 10195639.

It is an arithmetic number, because the mean of its divisors is an integer number (30447986400).

Almost surely, 2^402039040465 is an apocalyptic number.

It is an amenable number.

402039040465 is a deficient number, since it is larger than the sum of its proper divisors (85128741935).

402039040465 is a wasteful number, since it uses less digits than its factorization.

402039040465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59376.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 402039040465 its reverse (564040930204), we get a palindrome (966079970669).

The spelling of 402039040465 in words is "four hundred two billion, thirty-nine million, forty thousand, four hundred sixty-five".