1617427205461 has 2 divisors, whose sum is σ = 1617427205462. Its totient is φ = 1617427205460.

The previous prime is 1617427205417. The next prime is 1617427205531. The reversal of 1617427205461 is 1645027247161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1156257186436 + 461170019025 = 1075294^2 + 679095^2 .

It is an emirp because it is prime and its reverse (1645027247161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1617427205461 - 2³¹ = 1615279721813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1617427205411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808713602730 + 808713602731.

It is an arithmetic number, because the mean of its divisors is an integer number (808713602731).

Almost surely, 2^{1617427205461} is an apocalyptic number.

It is an amenable number.

1617427205461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617427205461 is an equidigital number, since it uses as much as digits as its factorization.

1617427205461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 1617427205461 in words is "one trillion, six hundred seventeen billion, four hundred twenty-seven million, two hundred five thousand, four hundred sixty-one".