90451450361 has 2 divisors, whose sum is σ = 90451450362. Its totient is φ = 90451450360.

The previous prime is 90451450357. The next prime is 90451450391. The reversal of 90451450361 is 16305415409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90069013225 + 382437136 = 300115^2 + 19556^2 .

It is a cyclic number.

It is not a de Polignac number, because 90451450361 - 2² = 90451450357 is a prime.

It is a super-3 number, since 3×90451450361³ (a number of 34 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (90451450301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45225725180 + 45225725181.

It is an arithmetic number, because the mean of its divisors is an integer number (45225725181).

Almost surely, 2^90451450361 is an apocalyptic number.

It is an amenable number.

90451450361 is a deficient number, since it is larger than the sum of its proper divisors (1).

90451450361 is an equidigital number, since it uses as much as digits as its factorization.

90451450361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 90451450361 in words is "ninety billion, four hundred fifty-one million, four hundred fifty thousand, three hundred sixty-one".