47854348981 has 4 divisors (see below), whose sum is σ = 47855480652. Its totient is φ = 47853217312.

The previous prime is 47854348979. The next prime is 47854349009. The reversal of 47854348981 is 18984345874.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24669414225 + 23184934756 = 157065^2 + 152266^2 .

It is a cyclic number.

It is not a de Polignac number, because 47854348981 - 2¹ = 47854348979 is a prime.

It is a super-2 number, since 2×47854348981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47854348961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499840 + ... + 587833.

It is an arithmetic number, because the mean of its divisors is an integer number (11963870163).

Almost surely, 2^47854348981 is an apocalyptic number.

It is an amenable number.

47854348981 is a deficient number, since it is larger than the sum of its proper divisors (1131671).

47854348981 is a wasteful number, since it uses less digits than its factorization.

47854348981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131670.

The product of its digits is 30965760, while the sum is 61.

The spelling of 47854348981 in words is "forty-seven billion, eight hundred fifty-four million, three hundred forty-eight thousand, nine hundred eighty-one".