90671782447 has 4 divisors (see below), whose sum is σ = 90709866216. Its totient is φ = 90633698680.

The previous prime is 90671782393. The next prime is 90671782451. The reversal of 90671782447 is 74428717609.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90671782447 - 2³⁵ = 56312044079 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 (90671782547) 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, 19038313 + ... + 19043074.

It is an arithmetic number, because the mean of its divisors is an integer number (22677466554).

Almost surely, 2^90671782447 is an apocalyptic number.

90671782447 is a deficient number, since it is larger than the sum of its proper divisors (38083769).

90671782447 is a wasteful number, since it uses less digits than its factorization.

90671782447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38083768.

The product of its (nonzero) digits is 4741632, while the sum is 55.

The spelling of 90671782447 in words is "ninety billion, six hundred seventy-one million, seven hundred eighty-two thousand, four hundred forty-seven".