43993969253 has 16 divisors (see below), whose sum is σ = 48504744960. Its totient is φ = 39648375936.

The previous prime is 43993969241. The next prime is 43993969259. The reversal of 43993969253 is 35296939934.

It is not a de Polignac number, because 43993969253 - 2⁶ = 43993969189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43993969259) 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, 161876 + ... + 337922.

It is an arithmetic number, because the mean of its divisors is an integer number (3031546560).

Almost surely, 2^43993969253 is an apocalyptic number.

It is an amenable number.

43993969253 is a deficient number, since it is larger than the sum of its proper divisors (4510775707).

43993969253 is a wasteful number, since it uses less digits than its factorization.

43993969253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176516.

The product of its digits is 42515280, while the sum is 62.

The spelling of 43993969253 in words is "forty-three billion, nine hundred ninety-three million, nine hundred sixty-nine thousand, two hundred fifty-three".