43561878455 has 32 divisors (see below), whose sum is σ = 56983227840. Its totient is φ = 31861140480.

The previous prime is 43561878407. The next prime is 43561878473. The reversal of 43561878455 is 55487816534.

It is not a de Polignac number, because 43561878455 - 2⁶ = 43561878391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43561878455.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236219 + ... + 378051.

It is an arithmetic number, because the mean of its divisors is an integer number (1780725870).

Almost surely, 2^43561878455 is an apocalyptic number.

43561878455 is a deficient number, since it is larger than the sum of its proper divisors (13421349385).

43561878455 is a wasteful number, since it uses less digits than its factorization.

43561878455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141971.

The product of its digits is 16128000, while the sum is 56.

The spelling of 43561878455 in words is "forty-three billion, five hundred sixty-one million, eight hundred seventy-eight thousand, four hundred fifty-five".