47781398183281 has 27 divisors (see below), whose sum is σ = 58662931215051. Its totient is φ = 38799185819184.

The previous prime is 47781398183279. The next prime is 47781398183291. The reversal of 47781398183281 is 18238189318774.

The square root of 47781398183281 is 6912409.

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

It can be written as a sum of positive squares in only one way, i.e., 12361236381025 + 35420161802256 = 3515855^2 + 5951484^2 .

It is not a de Polignac number, because 47781398183281 - 2¹ = 47781398183279 is a prime.

It is a super-2 number, since 2×47781398183281² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47781398183281.

It is not an unprimeable number, because it can be changed into a prime (47781398183231) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 919324411 + ... + 919376383.

It is an arithmetic number, because the mean of its divisors is an integer number (2172701156113).

Almost surely, 2^{47781398183281} is an apocalyptic number.

47781398183281 is the 6912409-th square number.

47781398183281 is the 3456205-th centered octagonal number.

It is an amenable number.

47781398183281 is a deficient number, since it is larger than the sum of its proper divisors (10881533031770).

47781398183281 is an frugal number, since it uses more digits than its factorization.

47781398183281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103998 (or 51999 counting only the distinct ones).

The product of its digits is 130056192, while the sum is 70.

The spelling of 47781398183281 in words is "forty-seven trillion, seven hundred eighty-one billion, three hundred ninety-eight million, one hundred eighty-three thousand, two hundred eighty-one".