161630020677 has 16 divisors (see below), whose sum is σ = 216604290560. Its totient is φ = 107205135552.

The previous prime is 161630020661. The next prime is 161630020679. The reversal of 161630020677 is 776020036161.

It is not a de Polignac number, because 161630020677 - 2⁴ = 161630020661 is a prime.

It is a super-2 number, since 2×161630020677² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161630020679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1044183 + ... + 1188939.

It is an arithmetic number, because the mean of its divisors is an integer number (13537768160).

Almost surely, 2^161630020677 is an apocalyptic number.

It is an amenable number.

161630020677 is a deficient number, since it is larger than the sum of its proper divisors (54974269883).

161630020677 is a wasteful number, since it uses less digits than its factorization.

161630020677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146652.

The product of its (nonzero) digits is 63504, while the sum is 39.

The spelling of 161630020677 in words is "one hundred sixty-one billion, six hundred thirty million, twenty thousand, six hundred seventy-seven".