161676544 has 18 divisors (see below), whose sum is σ = 322722050. Its totient is φ = 80838144.

The previous prime is 161676523. The next prime is 161676547. The reversal of 161676544 is 445676161.

It can be written as a sum of positive squares in only one way, i.e., 129049600 + 32626944 = 11360^2 + 5712^2 .

It is a super-2 number, since 2×161676544² = 52278609759567872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161676497 and 161676506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161676547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315519 + ... + 316030.

Almost surely, 2^161676544 is an apocalyptic number.

It is an amenable number.

161676544 is a deficient number, since it is larger than the sum of its proper divisors (161045506).

161676544 is an frugal number, since it uses more digits than its factorization.

161676544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631565 (or 631551 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 161676544 is about 12715.2091606863. The cubic root of 161676544 is about 544.7731221866.

The spelling of 161676544 in words is "one hundred sixty-one million, six hundred seventy-six thousand, five hundred forty-four".