43855242555 has 16 divisors (see below), whose sum is σ = 70171292160. Its totient is φ = 23388494688.

The previous prime is 43855242551. The next prime is 43855242577. The reversal of 43855242555 is 55524255834.

It is not a de Polignac number, because 43855242555 - 2² = 43855242551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43855242551) 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, 456564 + ... + 544206.

It is an arithmetic number, because the mean of its divisors is an integer number (4385705760).

Almost surely, 2^43855242555 is an apocalyptic number.

43855242555 is a deficient number, since it is larger than the sum of its proper divisors (26316049605).

43855242555 is a wasteful number, since it uses less digits than its factorization.

43855242555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121010.

The product of its digits is 4800000, while the sum is 48.

The spelling of 43855242555 in words is "forty-three billion, eight hundred fifty-five million, two hundred forty-two thousand, five hundred fifty-five".