84640632609 has 8 divisors (see below), whose sum is σ = 121535267392. Its totient is φ = 52086543120.

The previous prime is 84640632599. The next prime is 84640632649. The reversal of 84640632609 is 90623604648.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84640632609 - 2¹¹ = 84640630561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84640632649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1085136277 + ... + 1085136354.

It is an arithmetic number, because the mean of its divisors is an integer number (15191908424).

Almost surely, 2^84640632609 is an apocalyptic number.

It is an amenable number.

84640632609 is a deficient number, since it is larger than the sum of its proper divisors (36894634783).

84640632609 is a wasteful number, since it uses less digits than its factorization.

84640632609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170272647.

The product of its (nonzero) digits is 1492992, while the sum is 48.

The spelling of 84640632609 in words is "eighty-four billion, six hundred forty million, six hundred thirty-two thousand, six hundred nine".