89695728509 has 16 divisors (see below), whose sum is σ = 94389940224. Its totient is φ = 85070185200.

The previous prime is 89695728503. The next prime is 89695728547. The reversal of 89695728509 is 90582759698.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89695728509 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 (89695728503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1588064 + ... + 1643574.

It is an arithmetic number, because the mean of its divisors is an integer number (5899371264).

Almost surely, 2^89695728509 is an apocalyptic number.

It is an amenable number.

89695728509 is a deficient number, since it is larger than the sum of its proper divisors (4694211715).

89695728509 is a wasteful number, since it uses less digits than its factorization.

89695728509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56128.

The product of its (nonzero) digits is 97977600, while the sum is 68.

The spelling of 89695728509 in words is "eighty-nine billion, six hundred ninety-five million, seven hundred twenty-eight thousand, five hundred nine".