16173909958461 has 16 divisors (see below), whose sum is σ = 21839395374720. Its totient is φ = 10646110347200.

The previous prime is 16173909958447. The next prime is 16173909958477. The reversal of 16173909958461 is 16485990937161.

It is a cyclic number.

It is not a de Polignac number, because 16173909958461 - 2⁹ = 16173909957949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16173909918461) 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, 74235570 + ... + 74453123.

It is an arithmetic number, because the mean of its divisors is an integer number (1364962210920).

Almost surely, 2^{16173909958461} is an apocalyptic number.

It is an amenable number.

16173909958461 is a deficient number, since it is larger than the sum of its proper divisors (5665485416259).

16173909958461 is a wasteful number, since it uses less digits than its factorization.

16173909958461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148689156.

The product of its (nonzero) digits is 88179840, while the sum is 69.

The spelling of 16173909958461 in words is "sixteen trillion, one hundred seventy-three billion, nine hundred nine million, nine hundred fifty-eight thousand, four hundred sixty-one".