27631149693157 has 8 divisors (see below), whose sum is σ = 27665582232600. Its totient is φ = 27596738446080.

The previous prime is 27631149693143. The next prime is 27631149693209. The reversal of 27631149693157 is 75139694113672.

It is a Cunningham number, because it is equal to 5256534²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 27631149693156 = 1^2 + 5256534^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27631149693157 - 2¹¹ = 27631149691109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27631149699157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2725282 + ... + 7917667.

It is an arithmetic number, because the mean of its divisors is an integer number (3458197779075).

Almost surely, 2^{27631149693157} is an apocalyptic number.

It is an amenable number.

27631149693157 is a deficient number, since it is larger than the sum of its proper divisors (34432539443).

27631149693157 is a wasteful number, since it uses less digits than its factorization.

27631149693157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10646183.

The product of its digits is 51438240, while the sum is 64.

The spelling of 27631149693157 in words is "twenty-seven trillion, six hundred thirty-one billion, one hundred forty-nine million, six hundred ninety-three thousand, one hundred fifty-seven".