43746514081 has 2 divisors, whose sum is σ = 43746514082. Its totient is φ = 43746514080.

The previous prime is 43746514003. The next prime is 43746514087. The reversal of 43746514081 is 18041564734.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23411754081 + 20334760000 = 153009^2 + 142600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43746514081 is a prime.

It is a super-2 number, since 2×43746514081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43746514087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21873257040 + 21873257041.

It is an arithmetic number, because the mean of its divisors is an integer number (21873257041).

Almost surely, 2^43746514081 is an apocalyptic number.

It is an amenable number.

43746514081 is a deficient number, since it is larger than the sum of its proper divisors (1).

43746514081 is an equidigital number, since it uses as much as digits as its factorization.

43746514081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 43746514081 in words is "forty-three billion, seven hundred forty-six million, five hundred fourteen thousand, eighty-one".