5427681637 has 6 divisors (see below), whose sum is σ = 6313833798. Its totient is φ = 4652298504.

The previous prime is 5427681631. The next prime is 5427681713. The reversal of 5427681637 is 7361867245.

It can be written as a sum of positive squares in only one way, i.e., 4213437921 + 1214243716 = 64911^2 + 34846^2 .

It is a de Polignac number, because none of the positive numbers 2^k-5427681637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 110769013 = 5427681637 / (5 + 4 + 2 + 7 + 6 + 8 + 1 + 6 + 3 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5427681631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55384458 + ... + 55384555.

It is an arithmetic number, because the mean of its divisors is an integer number (1052305633).

Almost surely, 2^5427681637 is an apocalyptic number.

It is an amenable number.

5427681637 is a deficient number, since it is larger than the sum of its proper divisors (886152161).

5427681637 is a wasteful number, since it uses less digits than its factorization.

5427681637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110769027 (or 110769020 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 49.

The square root of 5427681637 is about 73672.8012023433. The cubic root of 5427681637 is about 1757.4033718821.

The spelling of 5427681637 in words is "five billion, four hundred twenty-seven million, six hundred eighty-one thousand, six hundred thirty-seven".