89434720642 has 8 divisors (see below), whose sum is σ = 134159403132. Its totient is φ = 44714919600.

The previous prime is 89434720631. The next prime is 89434720643. The reversal of 89434720642 is 24602743498.

It can be written as a sum of positive squares in 2 ways, for example, as 54868846081 + 34565874561 = 234241^2 + 185919^2 .

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

It is not an unprimeable number, because it can be changed into a prime (89434720643) 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, 1174209 + ... + 1248052.

Almost surely, 2^89434720642 is an apocalyptic number.

89434720642 is a deficient number, since it is larger than the sum of its proper divisors (44724682490).

89434720642 is a wasteful number, since it uses less digits than its factorization.

89434720642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440724.

The product of its (nonzero) digits is 2322432, while the sum is 49.

The spelling of 89434720642 in words is "eighty-nine billion, four hundred thirty-four million, seven hundred twenty thousand, six hundred forty-two".