90947775578 has 8 divisors (see below), whose sum is σ = 148823632800. Its totient is φ = 41339897980.

The previous prime is 90947775571. The next prime is 90947775617. The reversal of 90947775578 is 87557774909.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (90947775571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2066994878 + ... + 2066994921.

It is an arithmetic number, because the mean of its divisors is an integer number (18602954100).

Almost surely, 2^90947775578 is an apocalyptic number.

90947775578 is a deficient number, since it is larger than the sum of its proper divisors (57875857222).

90947775578 is a wasteful number, since it uses less digits than its factorization.

90947775578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4133989812.

The product of its (nonzero) digits is 155584800, while the sum is 68.

The spelling of 90947775578 in words is "ninety billion, nine hundred forty-seven million, seven hundred seventy-five thousand, five hundred seventy-eight".