84021527965 has 4 divisors (see below), whose sum is σ = 100825833564. Its totient is φ = 67217222368.

The previous prime is 84021527963. The next prime is 84021527971. The reversal of 84021527965 is 56972512048.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53201267716 + 30820260249 = 230654^2 + 175557^2 .

It is a cyclic number.

It is not a de Polignac number, because 84021527965 - 2¹ = 84021527963 is a prime.

It is a Smith number, since the sum of its digits (49) 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (84021527963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8402152792 + ... + 8402152801.

It is an arithmetic number, because the mean of its divisors is an integer number (25206458391).

Almost surely, 2^84021527965 is an apocalyptic number.

It is an amenable number.

84021527965 is a deficient number, since it is larger than the sum of its proper divisors (16804305599).

84021527965 is a wasteful number, since it uses less digits than its factorization.

84021527965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16804305598.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 84021527965 in words is "eighty-four billion, twenty-one million, five hundred twenty-seven thousand, nine hundred sixty-five".