90319219664 has 10 divisors (see below), whose sum is σ = 174993488130. Its totient is φ = 45159609824.

The previous prime is 90319219663. The next prime is 90319219703. The reversal of 90319219664 is 46691291309.

It can be written as a sum of positive squares in only one way, i.e., 75464485264 + 14854734400 = 274708^2 + 121880^2 .

It is a super-2 number, since 2×90319219664² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90319219663) 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 as a sum of consecutive naturals, namely, 2822475599 + ... + 2822475630.

It is an arithmetic number, because the mean of its divisors is an integer number (17499348813).

Almost surely, 2^90319219664 is an apocalyptic number.

It is an amenable number.

90319219664 is a deficient number, since it is larger than the sum of its proper divisors (84674268466).

90319219664 is a wasteful number, since it uses less digits than its factorization.

90319219664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5644951237 (or 5644951231 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 50.

The spelling of 90319219664 in words is "ninety billion, three hundred nineteen million, two hundred nineteen thousand, six hundred sixty-four".