90715651709 has 8 divisors (see below), whose sum is σ = 93848847960. Its totient is φ = 87582793536.

The previous prime is 90715651679. The next prime is 90715651759.

90715651709 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 3456264100 + 87259387609 = 58790^2 + 295397^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90715651709 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 (90715651759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539627 + ... + 687479.

It is an arithmetic number, because the mean of its divisors is an integer number (11731105995).

Almost surely, 2^90715651709 is an apocalyptic number.

It is an amenable number.

90715651709 is a deficient number, since it is larger than the sum of its proper divisors (3133196251).

90715651709 is a wasteful number, since it uses less digits than its factorization.

90715651709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169039.

The product of its (nonzero) digits is 595350, while the sum is 50.

The spelling of 90715651709 in words is "ninety billion, seven hundred fifteen million, six hundred fifty-one thousand, seven hundred nine".