3561671607737 has 2 divisors, whose sum is σ = 3561671607738. Its totient is φ = 3561671607736.

The previous prime is 3561671607677. The next prime is 3561671607757. The reversal of 3561671607737 is 7377061761653.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3398698725136 + 162972882601 = 1843556^2 + 403699^2 .

It is a cyclic number.

It is not a de Polignac number, because 3561671607737 - 2¹⁶ = 3561671542201 is a prime.

It is a super-2 number, since 2×3561671607737² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3561671607757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1780835803868 + 1780835803869.

It is an arithmetic number, because the mean of its divisors is an integer number (1780835803869).

Almost surely, 2^{3561671607737} is an apocalyptic number.

It is an amenable number.

3561671607737 is a deficient number, since it is larger than the sum of its proper divisors (1).

3561671607737 is an equidigital number, since it uses as much as digits as its factorization.

3561671607737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23337720, while the sum is 59.

The spelling of 3561671607737 in words is "three trillion, five hundred sixty-one billion, six hundred seventy-one million, six hundred seven thousand, seven hundred thirty-seven".