161976653 has 16 divisors (see below), whose sum is σ = 174873600. Its totient is φ = 149563440.

The previous prime is 161976583. The next prime is 161976677. The reversal of 161976653 is 356679161.

161976653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161976653 - 2¹² = 161972557 is a prime.

It is a super-2 number, since 2×161976653² = 52472872234164818, which 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 (161972653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146300 + ... + 147402.

It is an arithmetic number, because the mean of its divisors is an integer number (10929600).

Almost surely, 2^161976653 is an apocalyptic number.

It is an amenable number.

161976653 is a deficient number, since it is larger than the sum of its proper divisors (12896947).

161976653 is a wasteful number, since it uses less digits than its factorization.

161976653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312.

The product of its digits is 204120, while the sum is 44.

The square root of 161976653 is about 12727.0048715320. The cubic root of 161976653 is about 545.1099887431.

The spelling of 161976653 in words is "one hundred sixty-one million, nine hundred seventy-six thousand, six hundred fifty-three".