601551343451081 has 2 divisors, whose sum is σ = 601551343451082. Its totient is φ = 601551343451080.

The previous prime is 601551343451029. The next prime is 601551343451147. The reversal of 601551343451081 is 180154343155106.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 577147002445456 + 24404341005625 = 24023884^2 + 4940075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-601551343451081 is a prime.

It is a super-2 number, since 2×601551343451081² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (601551343451881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300775671725540 + 300775671725541.

It is an arithmetic number, because the mean of its divisors is an integer number (300775671725541).

Almost surely, 2^{601551343451081} is an apocalyptic number.

It is an amenable number.

601551343451081 is a deficient number, since it is larger than the sum of its proper divisors (1).

601551343451081 is an equidigital number, since it uses as much as digits as its factorization.

601551343451081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 601551343451081 in words is "six hundred one trillion, five hundred fifty-one billion, three hundred forty-three million, four hundred fifty-one thousand, eighty-one".