84402965421 has 6 divisors (see below), whose sum is σ = 121915394510. Its totient is φ = 56268643608.

The previous prime is 84402965411. The next prime is 84402965429. The reversal of 84402965421 is 12456920448.

It is a happy number.

84402965421 is a `hidden beast` number, since 84 + 4 + 0 + 29 + 6 + 542 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 76610489796 + 7792475625 = 276786^2 + 88275^2 .

It is not a de Polignac number, because 84402965421 - 2¹⁷ = 84402834349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84402965429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4689053626 + ... + 4689053643.

Almost surely, 2^84402965421 is an apocalyptic number.

It is an amenable number.

84402965421 is a deficient number, since it is larger than the sum of its proper divisors (37512429089).

84402965421 is a wasteful number, since it uses less digits than its factorization.

84402965421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9378107275 (or 9378107272 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 84402965421 in words is "eighty-four billion, four hundred two million, nine hundred sixty-five thousand, four hundred twenty-one".