161687375770 has 16 divisors (see below), whose sum is σ = 291135289248. Its totient is φ = 64653169680.

The previous prime is 161687375767. The next prime is 161687375803. The reversal of 161687375770 is 77573786161.

It is a happy number.

161687375770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161687375770² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2691384 + ... + 2750803.

It is an arithmetic number, because the mean of its divisors is an integer number (18195955578).

Almost surely, 2^161687375770 is an apocalyptic number.

161687375770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161687375770 is a deficient number, since it is larger than the sum of its proper divisors (129447913478).

161687375770 is a wasteful number, since it uses less digits than its factorization.

161687375770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5445165.

The product of its (nonzero) digits is 10372320, while the sum is 58.

The spelling of 161687375770 in words is "one hundred sixty-one billion, six hundred eighty-seven million, three hundred seventy-five thousand, seven hundred seventy".