1616363774257 has 2 divisors, whose sum is σ = 1616363774258. Its totient is φ = 1616363774256.

The previous prime is 1616363774239. The next prime is 1616363774299. The reversal of 1616363774257 is 7524773636161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1303430939041 + 312932835216 = 1141679^2 + 559404^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1616363774257 is a prime.

It is a super-2 number, since 2×1616363774257² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1616363784257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808181887128 + 808181887129.

It is an arithmetic number, because the mean of its divisors is an integer number (808181887129).

Almost surely, 2^{1616363774257} is an apocalyptic number.

It is an amenable number.

1616363774257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616363774257 is an equidigital number, since it uses as much as digits as its factorization.

1616363774257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26671680, while the sum is 58.

The spelling of 1616363774257 in words is "one trillion, six hundred sixteen billion, three hundred sixty-three million, seven hundred seventy-four thousand, two hundred fifty-seven".