90544420836 has 135 divisors (see below), whose sum is σ = 241040456811. Its totient is φ = 29638037376.

The previous prime is 90544420819. The next prime is 90544420853. The reversal of 90544420836 is 63802444509.

The square root of 90544420836 is 300906.

It is a perfect power (a square), and thus also a powerful number.

90544420836 is a `hidden beast` number, since 9 + 0 + 544 + 4 + 20 + 83 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (90544420819) and next prime (90544420853).

It can be written as a sum of positive squares in 4 ways, for example, as 27872302500 + 62672118336 = 166950^2 + 250344^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90544420791 and 90544420800.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 395390370 + ... + 395390598.

Almost surely, 2^90544420836 is an apocalyptic number.

90544420836 is the 300906-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90544420836

90544420836 is an abundant number, since it is smaller than the sum of its proper divisors (150496035975).

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

90544420836 is an equidigital number, since it uses as much as digits as its factorization.

90544420836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 90544420836 in words is "ninety billion, five hundred forty-four million, four hundred twenty thousand, eight hundred thirty-six".