47642247155 has 4 divisors (see below), whose sum is σ = 57170696592. Its totient is φ = 38113797720.

The previous prime is 47642247143. The next prime is 47642247157. The reversal of 47642247155 is 55174224674.

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

It is not a de Polignac number, because 47642247155 - 2¹⁰ = 47642246131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47642247157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4764224711 + ... + 4764224720.

It is an arithmetic number, because the mean of its divisors is an integer number (14292674148).

Almost surely, 2^47642247155 is an apocalyptic number.

47642247155 is a deficient number, since it is larger than the sum of its proper divisors (9528449437).

47642247155 is an equidigital number, since it uses as much as digits as its factorization.

47642247155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9528449436.

The product of its digits is 1881600, while the sum is 47.

The spelling of 47642247155 in words is "forty-seven billion, six hundred forty-two million, two hundred forty-seven thousand, one hundred fifty-five".