161516835037 has 4 divisors (see below), whose sum is σ = 161648044096. Its totient is φ = 161385625980.

The previous prime is 161516835031. The next prime is 161516835043. The reversal of 161516835037 is 730538615161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (161516835031) and next prime (161516835043).

It is a cyclic number.

It is not a de Polignac number, because 161516835037 - 2²⁷ = 161382617309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161516835031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65602683 + ... + 65605144.

It is an arithmetic number, because the mean of its divisors is an integer number (40412011024).

Almost surely, 2^161516835037 is an apocalyptic number.

It is an amenable number.

161516835037 is a deficient number, since it is larger than the sum of its proper divisors (131209059).

161516835037 is a wasteful number, since it uses less digits than its factorization.

161516835037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131209058.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 161516835037 in words is "one hundred sixty-one billion, five hundred sixteen million, eight hundred thirty-five thousand, thirty-seven".