47640738636 has 36 divisors (see below), whose sum is σ = 121550679432. Its totient is φ = 15731831424.

The previous prime is 47640738631. The next prime is 47640738637. The reversal of 47640738636 is 63683704674.

It is a happy number.

47640738636 is a `hidden beast` number, since 476 + 40 + 73 + 8 + 63 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (47640738631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6180045 + ... + 6187748.

It is an arithmetic number, because the mean of its divisors is an integer number (3376407762).

Almost surely, 2^47640738636 is an apocalyptic number.

It is an amenable number.

47640738636 is an abundant number, since it is smaller than the sum of its proper divisors (73909940796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47640738636 is a wasteful number, since it uses less digits than its factorization.

47640738636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12367910 (or 12367905 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 54.

The spelling of 47640738636 in words is "forty-seven billion, six hundred forty million, seven hundred thirty-eight thousand, six hundred thirty-six".