43493457831849 has 45 divisors (see below), whose sum is σ = 68573027279757. Its totient is φ = 27468840059496.

The previous prime is 43493457831799. The next prime is 43493457831871. The reversal of 43493457831849 is 94813875439434.

The square root of 43493457831849 is 6594957.

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

43493457831849 is a `hidden beast` number, since 4 + 3 + 4 + 9 + 3 + 4 + 578 + 3 + 1 + 8 + 49 = 666.

It is not a de Polignac number, because 43493457831849 - 2¹³ = 43493457823657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43493457831899) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1127718364 + ... + 1127756930.

Almost surely, 2^{43493457831849} is an apocalyptic number.

43493457831849 is the 6594957-th square number.

43493457831849 is the 3297479-th centered octagonal number.

It is an amenable number.

43493457831849 is a deficient number, since it is larger than the sum of its proper divisors (25079569447908).

43493457831849 is an frugal number, since it uses more digits than its factorization.

43493457831849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77184 (or 38589 counting only the distinct ones).

The product of its digits is 1254113280, while the sum is 72.

The spelling of 43493457831849 in words is "forty-three trillion, four hundred ninety-three billion, four hundred fifty-seven million, eight hundred thirty-one thousand, eight hundred forty-nine".