4172945856458 has 4 divisors (see below), whose sum is σ = 6259418784690. Its totient is φ = 2086472928228.

The previous prime is 4172945856449. The next prime is 4172945856461. The reversal of 4172945856458 is 8546585492714.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4171181268409 + 1764588049 = 2042347^2 + 42007^2 .

It is a super-2 number, since 2×4172945856458² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043236464113 + ... + 1043236464116.

Almost surely, 2^{4172945856458} is an apocalyptic number.

4172945856458 is a deficient number, since it is larger than the sum of its proper divisors (2086472928232).

4172945856458 is a wasteful number, since it uses less digits than its factorization.

4172945856458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086472928231.

The product of its digits is 387072000, while the sum is 68.

The spelling of 4172945856458 in words is "four trillion, one hundred seventy-two billion, nine hundred forty-five million, eight hundred fifty-six thousand, four hundred fifty-eight".