45206450981 has 2 divisors, whose sum is σ = 45206450982. Its totient is φ = 45206450980.

The previous prime is 45206450963. The next prime is 45206451019. The reversal of 45206450981 is 18905460254.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44686154881 + 520296100 = 211391^2 + 22810^2 .

It is a cyclic number.

It is not a de Polignac number, because 45206450981 - 2¹⁸ = 45206188837 is a prime.

It is a super-2 number, since 2×45206450981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45206450951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22603225490 + 22603225491.

It is an arithmetic number, because the mean of its divisors is an integer number (22603225491).

Almost surely, 2^45206450981 is an apocalyptic number.

It is an amenable number.

45206450981 is a deficient number, since it is larger than the sum of its proper divisors (1).

45206450981 is an equidigital number, since it uses as much as digits as its factorization.

45206450981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 45206450981 in words is "forty-five billion, two hundred six million, four hundred fifty thousand, nine hundred eighty-one".