47664243638 has 16 divisors (see below), whose sum is σ = 82101090240. Its totient is φ = 20525272200.

The previous prime is 47664243617. The next prime is 47664243659. The reversal of 47664243638 is 83634246674.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (47664243617) and next prime (47664243659).

It is a self number, because there is not a number n which added to its sum of digits gives 47664243638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57014228 + ... + 57015063.

It is an arithmetic number, because the mean of its divisors is an integer number (5131318140).

Almost surely, 2^47664243638 is an apocalyptic number.

47664243638 is a deficient number, since it is larger than the sum of its proper divisors (34436846602).

47664243638 is a wasteful number, since it uses less digits than its factorization.

47664243638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114029323.

The product of its digits is 13934592, while the sum is 53.

The spelling of 47664243638 in words is "forty-seven billion, six hundred sixty-four million, two hundred forty-three thousand, six hundred thirty-eight".