618147517820401 has 2 divisors, whose sum is σ = 618147517820402. Its totient is φ = 618147517820400.

The previous prime is 618147517820383. The next prime is 618147517820467. The reversal of 618147517820401 is 104028715741816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497472876810000 + 120674641010401 = 22304100^2 + 10985201^2 .

It is a cyclic number.

It is not a de Polignac number, because 618147517820401 - 2³⁵ = 618113158082033 is a prime.

It is not a weakly prime, because it can be changed into another prime (618147517820201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309073758910200 + 309073758910201.

It is an arithmetic number, because the mean of its divisors is an integer number (309073758910201).

Almost surely, 2^{618147517820401} is an apocalyptic number.

It is an amenable number.

618147517820401 is a deficient number, since it is larger than the sum of its proper divisors (1).

618147517820401 is an equidigital number, since it uses as much as digits as its factorization.

618147517820401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3010560, while the sum is 55.

The spelling of 618147517820401 in words is "six hundred eighteen trillion, one hundred forty-seven billion, five hundred seventeen million, eight hundred twenty thousand, four hundred one".