161276690674576 has 45 divisors (see below), whose sum is σ = 331937388351219. Its totient is φ = 75894506875392.

The previous prime is 161276690674553. The next prime is 161276690674577. The reversal of 161276690674576 is 675476096672161.

The square root of 161276690674576 is 12699476.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 13393579756176 + 147883110918400 = 3659724^2 + 12160720^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161276690674499 and 161276690674508.

It is not an unprimeable number, because it can be changed into a prime (161276690674577) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 863470990 + ... + 863657746.

Almost surely, 2^{161276690674576} is an apocalyptic number.

161276690674576 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

161276690674576 is the 12699476-th square number.

It is an amenable number.

161276690674576 is an abundant number, since it is smaller than the sum of its proper divisors (170660697676643).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161276690674576 is an frugal number, since it uses more digits than its factorization.

161276690674576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373556 (or 186776 counting only the distinct ones).

The product of its (nonzero) digits is 960180480, while the sum is 73.

The spelling of 161276690674576 in words is "one hundred sixty-one trillion, two hundred seventy-six billion, six hundred ninety million, six hundred seventy-four thousand, five hundred seventy-six".