90646288648 has 8 divisors (see below), whose sum is σ = 169961791230. Its totient is φ = 45323144320.

The previous prime is 90646288571. The next prime is 90646288687. The reversal of 90646288648 is 84688264609.

It can be written as a sum of positive squares in only one way, i.e., 68320549924 + 22325738724 = 261382^2 + 149418^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665393033 + ... + 5665393048.

Almost surely, 2^90646288648 is an apocalyptic number.

It is an amenable number.

90646288648 is a deficient number, since it is larger than the sum of its proper divisors (79315502582).

90646288648 is a wasteful number, since it uses less digits than its factorization.

90646288648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11330786087 (or 11330786083 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 61.

The spelling of 90646288648 in words is "ninety billion, six hundred forty-six million, two hundred eighty-eight thousand, six hundred forty-eight".