90671806368 has 144 divisors (see below), whose sum is σ = 302926399776. Its totient is φ = 25362731520.

The previous prime is 90671806367. The next prime is 90671806387. The reversal of 90671806368 is 86360817609.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (90671806363) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1059630 + ... + 1141997.

It is an arithmetic number, because the mean of its divisors is an integer number (2103655554).

Almost surely, 2^90671806368 is an apocalyptic number.

It is an amenable number.

90671806368 is an abundant number, since it is smaller than the sum of its proper divisors (212254593408).

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

90671806368 is a wasteful number, since it uses less digits than its factorization.

90671806368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201667 (or 2201656 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 90671806368 in words is "ninety billion, six hundred seventy-one million, eight hundred six thousand, three hundred sixty-eight".