161310770677 has 4 divisors (see below), whose sum is σ = 184355166496. Its totient is φ = 138266374860.

The previous prime is 161310770639. The next prime is 161310770689. The reversal of 161310770677 is 776077013161.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 161310770677 - 2¹¹ = 161310768629 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 (161310770627) 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, 11522197899 + ... + 11522197912.

It is an arithmetic number, because the mean of its divisors is an integer number (46088791624).

Almost surely, 2^161310770677 is an apocalyptic number.

It is an amenable number.

161310770677 is a deficient number, since it is larger than the sum of its proper divisors (23044395819).

161310770677 is an equidigital number, since it uses as much as digits as its factorization.

161310770677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23044395818.

The product of its (nonzero) digits is 259308, while the sum is 46.

The spelling of 161310770677 in words is "one hundred sixty-one billion, three hundred ten million, seven hundred seventy thousand, six hundred seventy-seven".