90532072649 has 2 divisors, whose sum is σ = 90532072650. Its totient is φ = 90532072648.

The previous prime is 90532072639. The next prime is 90532072669. The reversal of 90532072649 is 94627023509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65468433424 + 25063639225 = 255868^2 + 158315^2 .

It is a cyclic number.

It is not a de Polignac number, because 90532072649 - 2²⁴ = 90515295433 is a prime.

It is not a weakly prime, because it can be changed into another prime (90532072639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45266036324 + 45266036325.

It is an arithmetic number, because the mean of its divisors is an integer number (45266036325).

Almost surely, 2^90532072649 is an apocalyptic number.

It is an amenable number.

90532072649 is a deficient number, since it is larger than the sum of its proper divisors (1).

90532072649 is an equidigital number, since it uses as much as digits as its factorization.

90532072649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 90532072649 in words is "ninety billion, five hundred thirty-two million, seventy-two thousand, six hundred forty-nine".