90436721216 has 14 divisors (see below), whose sum is σ = 179460368790. Its totient is φ = 45218360576.

The previous prime is 90436721153. The next prime is 90436721317. The reversal of 90436721216 is 61212763409.

It can be written as a sum of positive squares in only one way, i.e., 53842561600 + 36594159616 = 232040^2 + 191296^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 706536821 + ... + 706536948.

Almost surely, 2^90436721216 is an apocalyptic number.

It is an amenable number.

90436721216 is a deficient number, since it is larger than the sum of its proper divisors (89023647574).

90436721216 is a wasteful number, since it uses less digits than its factorization.

90436721216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413073781 (or 1413073771 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 90436721216 in words is "ninety billion, four hundred thirty-six million, seven hundred twenty-one thousand, two hundred sixteen".