45531781641613 has 2 divisors, whose sum is σ = 45531781641614. Its totient is φ = 45531781641612.

The previous prime is 45531781641611. The next prime is 45531781641623. The reversal of 45531781641613 is 31614618713554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45531752189284 + 29452329 = 6747722^2 + 5427^2 .

It is a cyclic number.

It is not a de Polignac number, because 45531781641613 - 2¹ = 45531781641611 is a prime.

Together with 45531781641611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45531781641611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22765890820806 + 22765890820807.

It is an arithmetic number, because the mean of its divisors is an integer number (22765890820807).

Almost surely, 2^{45531781641613} is an apocalyptic number.

It is an amenable number.

45531781641613 is a deficient number, since it is larger than the sum of its proper divisors (1).

45531781641613 is an equidigital number, since it uses as much as digits as its factorization.

45531781641613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7257600, while the sum is 55.

The spelling of 45531781641613 in words is "forty-five trillion, five hundred thirty-one billion, seven hundred eighty-one million, six hundred forty-one thousand, six hundred thirteen".