47738680477 has 4 divisors (see below), whose sum is σ = 47739507100. Its totient is φ = 47737853856.

The previous prime is 47738680463. The next prime is 47738680499. The reversal of 47738680477 is 77408683774.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77408683774 = 2 ⋅38704341887.

It can be written as a sum of positive squares in 2 ways, for example, as 32918296356 + 14820384121 = 181434^2 + 121739^2 .

It is a cyclic number.

It is not a de Polignac number, because 47738680477 - 2⁷ = 47738680349 is a prime.

It is a super-4 number, since 4×47738680477⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47738683477) 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, 319602 + ... + 444547.

It is an arithmetic number, because the mean of its divisors is an integer number (11934876775).

Almost surely, 2^47738680477 is an apocalyptic number.

It is an amenable number.

47738680477 is a deficient number, since it is larger than the sum of its proper divisors (826623).

47738680477 is an equidigital number, since it uses as much as digits as its factorization.

47738680477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826622.

The product of its (nonzero) digits is 44255232, while the sum is 61.

The spelling of 47738680477 in words is "forty-seven billion, seven hundred thirty-eight million, six hundred eighty thousand, four hundred seventy-seven".