27351797697 has 72 divisors (see below), whose sum is σ = 47422458720. Its totient is φ = 15137297280.

The previous prime is 27351797689. The next prime is 27351797713. The reversal of 27351797697 is 79679715372.

27351797697 is a `hidden beast` number, since 27 + 3 + 517 + 9 + 7 + 6 + 97 = 666.

It is not a de Polignac number, because 27351797697 - 2³ = 27351797689 is a prime.

It is a super-2 number, since 2×27351797697² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (27351797617) 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 71 ways as a sum of consecutive naturals, for example, 2507818 + ... + 2518700.

It is an arithmetic number, because the mean of its divisors is an integer number (658645260).

Almost surely, 2^27351797697 is an apocalyptic number.

It is an amenable number.

27351797697 is a deficient number, since it is larger than the sum of its proper divisors (20070661023).

27351797697 is a wasteful number, since it uses less digits than its factorization.

27351797697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11083 (or 11073 counting only the distinct ones).

The product of its digits is 35006580, while the sum is 63.

The spelling of 27351797697 in words is "twenty-seven billion, three hundred fifty-one million, seven hundred ninety-seven thousand, six hundred ninety-seven".