161075514637 has 2 divisors, whose sum is σ = 161075514638. Its totient is φ = 161075514636.

The previous prime is 161075514577. The next prime is 161075514659. The reversal of 161075514637 is 736415570161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110843050761 + 50232463876 = 332931^2 + 224126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161075514637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161075514337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80537757318 + 80537757319.

It is an arithmetic number, because the mean of its divisors is an integer number (80537757319).

Almost surely, 2^161075514637 is an apocalyptic number.

It is an amenable number.

161075514637 is a deficient number, since it is larger than the sum of its proper divisors (1).

161075514637 is an equidigital number, since it uses as much as digits as its factorization.

161075514637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 161075514637 in words is "one hundred sixty-one billion, seventy-five million, five hundred fourteen thousand, six hundred thirty-seven".