27656969351 has 4 divisors (see below), whose sum is σ = 30171239304. Its totient is φ = 25142699400.

The previous prime is 27656969339. The next prime is 27656969357. The reversal of 27656969351 is 15396965672.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 27656969351 - 2¹⁸ = 27656707207 is a prime.

It is a super-2 number, since 2×27656969351² (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 (27656969357) 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, 1257134960 + ... + 1257134981.

It is an arithmetic number, because the mean of its divisors is an integer number (7542809826).

Almost surely, 2^27656969351 is an apocalyptic number.

27656969351 is a deficient number, since it is larger than the sum of its proper divisors (2514269953).

27656969351 is a wasteful number, since it uses less digits than its factorization.

27656969351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514269952.

The product of its digits is 18370800, while the sum is 59.

The spelling of 27656969351 in words is "twenty-seven billion, six hundred fifty-six million, nine hundred sixty-nine thousand, three hundred fifty-one".