43778534662 has 4 divisors (see below), whose sum is σ = 65667801996. Its totient is φ = 21889267330.

The previous prime is 43778534561. The next prime is 43778534671. The reversal of 43778534662 is 26643587734.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10944633664 + ... + 10944633667.

It is an arithmetic number, because the mean of its divisors is an integer number (16416950499).

Almost surely, 2^43778534662 is an apocalyptic number.

43778534662 is a deficient number, since it is larger than the sum of its proper divisors (21889267334).

43778534662 is a wasteful number, since it uses less digits than its factorization.

43778534662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21889267333.

The product of its digits is 20321280, while the sum is 55.

The spelling of 43778534662 in words is "forty-three billion, seven hundred seventy-eight million, five hundred thirty-four thousand, six hundred sixty-two".