90671782449 has 16 divisors (see below), whose sum is σ = 123861475584. Its totient is φ = 58965379200.

The previous prime is 90671782393. The next prime is 90671782451. The reversal of 90671782449 is 94428717609.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-90671782449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90671782459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 918984 + ... + 1012854.

It is an arithmetic number, because the mean of its divisors is an integer number (7741342224).

Almost surely, 2^90671782449 is an apocalyptic number.

It is an amenable number.

90671782449 is a deficient number, since it is larger than the sum of its proper divisors (33189693135).

90671782449 is a wasteful number, since it uses less digits than its factorization.

90671782449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101768.

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 90671782449 in words is "ninety billion, six hundred seventy-one million, seven hundred eighty-two thousand, four hundred forty-nine".