90963687440 has 40 divisors (see below), whose sum is σ = 213467140800. Its totient is φ = 36045420416.

The previous prime is 90963687439. The next prime is 90963687449. The reversal of 90963687440 is 4478636909.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (90963687449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5304740 + ... + 5321859.

It is an arithmetic number, because the mean of its divisors is an integer number (5336678520).

Almost surely, 2^90963687440 is an apocalyptic number.

It is an amenable number.

90963687440 is an abundant number, since it is smaller than the sum of its proper divisors (122503453360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90963687440 is a wasteful number, since it uses less digits than its factorization.

90963687440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10626719 (or 10626713 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 56.

The spelling of 90963687440 in words is "ninety billion, nine hundred sixty-three million, six hundred eighty-seven thousand, four hundred forty".