43420255050555 has 16 divisors (see below), whose sum is σ = 77191564534560. Its totient is φ = 23157469360224.

The previous prime is 43420255050551. The next prime is 43420255050619. The reversal of 43420255050555 is 55505055202434.

43420255050555 is a `hidden beast` number, since 4 + 3 + 4 + 20 + 25 + 5 + 0 + 50 + 555 = 666.

It is not a de Polignac number, because 43420255050555 - 2² = 43420255050551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 43420255050555.

It is not an unprimeable number, because it can be changed into a prime (43420255050551) 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, 160815759312 + ... + 160815759581.

It is an arithmetic number, because the mean of its divisors is an integer number (4824472783410).

Almost surely, 2^{43420255050555} is an apocalyptic number.

43420255050555 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

43420255050555 is a deficient number, since it is larger than the sum of its proper divisors (33771309484005).

43420255050555 is a wasteful number, since it uses less digits than its factorization.

43420255050555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321631518907 (or 321631518901 counting only the distinct ones).

The product of its (nonzero) digits is 3000000, while the sum is 45.

The spelling of 43420255050555 in words is "forty-three trillion, four hundred twenty billion, two hundred fifty-five million, fifty thousand, five hundred fifty-five".