90778419996 has 72 divisors (see below), whose sum is σ = 235770312960. Its totient is φ = 27160367520.

The previous prime is 90778419989. The next prime is 90778420093. The reversal of 90778419996 is 69991487709.

It is a self number, because there is not a number n which added to its sum of digits gives 90778419996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 280986 + ... + 510401.

It is an arithmetic number, because the mean of its divisors is an integer number (3274587680).

Almost surely, 2^90778419996 is an apocalyptic number.

It is an amenable number.

90778419996 is an abundant number, since it is smaller than the sum of its proper divisors (144991892964).

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

90778419996 is a wasteful number, since it uses less digits than its factorization.

90778419996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791495 (or 791482 counting only the distinct ones).

The product of its (nonzero) digits is 61725888, while the sum is 69.

The spelling of 90778419996 in words is "ninety billion, seven hundred seventy-eight million, four hundred nineteen thousand, nine hundred ninety-six".