90722634174649 has 9 divisors (see below), whose sum is σ = 93743880270159. Its totient is φ = 87795811843080.

The previous prime is 90722634174607. The next prime is 90722634174709. The reversal of 90722634174649 is 94647143622709.

The square root of 90722634174649 is 9524843.

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

It can be written as a sum of positive squares in only one way, i.e., 89025169149225 + 1697465025424 = 9435315^2 + 1302868^2 .

It is not a de Polignac number, because 90722634174649 - 2¹³ = 90722634166457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90722634174449) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 295116507 + ... + 295423759.

Almost surely, 2^{90722634174649} is an apocalyptic number.

90722634174649 is the 9524843-rd square number.

90722634174649 is the 4762422-nd centered octagonal number.

It is an amenable number.

90722634174649 is a deficient number, since it is larger than the sum of its proper divisors (3021246095510).

90722634174649 is an frugal number, since it uses more digits than its factorization.

90722634174649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614568 (or 307284 counting only the distinct ones).

The product of its (nonzero) digits is 109734912, while the sum is 64.

The spelling of 90722634174649 in words is "ninety trillion, seven hundred twenty-two billion, six hundred thirty-four million, one hundred seventy-four thousand, six hundred forty-nine".