84007715561 has 48 divisors (see below), whose sum is σ = 107851347072. Its totient is φ = 64028490240.

The previous prime is 84007715549. The next prime is 84007715569. The reversal of 84007715561 is 16551770048.

It is a de Polignac number, because none of the positive numbers 2^k-84007715561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84007715569) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15574481 + ... + 15579873.

It is an arithmetic number, because the mean of its divisors is an integer number (2246903064).

Almost surely, 2^84007715561 is an apocalyptic number.

It is an amenable number.

84007715561 is a deficient number, since it is larger than the sum of its proper divisors (23843631511).

84007715561 is a wasteful number, since it uses less digits than its factorization.

84007715561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5822 (or 5811 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 44.

The spelling of 84007715561 in words is "eighty-four billion, seven million, seven hundred fifteen thousand, five hundred sixty-one".