47768910721 has 9 divisors (see below), whose sum is σ = 55569696321. Its totient is φ = 40943469252.

The previous prime is 47768910649. The next prime is 47768910727. The reversal of 47768910721 is 12701986774.

The square root of 47768910721 is 218561.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 47768910721 - 2¹⁵ = 47768877953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47768910727) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1514316 + ... + 1545538.

Almost surely, 2^47768910721 is an apocalyptic number.

47768910721 is the 218561-st square number.

47768910721 is the 109281-st centered octagonal number.

It is an amenable number.

47768910721 is a deficient number, since it is larger than the sum of its proper divisors (7800785600).

47768910721 is an frugal number, since it uses more digits than its factorization.

47768910721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62460 (or 31230 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 52.

The spelling of 47768910721 in words is "forty-seven billion, seven hundred sixty-eight million, nine hundred ten thousand, seven hundred twenty-one".