7697181312 has 48 divisors (see below), whose sum is σ = 22149444330. Its totient is φ = 2565726720.

The previous prime is 7697181277. The next prime is 7697181313. The reversal of 7697181312 is 2131817967.

7697181312 is a `hidden beast` number, since 76 + 97 + 181 + 312 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7669555776 + 27625536 = 87576^2 + 5256^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (7697181313) 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, 3339639 + ... + 3341942.

Almost surely, 2^7697181312 is an apocalyptic number.

7697181312 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

7697181312 is an abundant number, since it is smaller than the sum of its proper divisors (14452263018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7697181312 is a wasteful number, since it uses less digits than its factorization.

7697181312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6681601 (or 6681586 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 7697181312 is about 87733.5814383523. The cubic root of 7697181312 is about 1974.4398400285.

The spelling of 7697181312 in words is "seven billion, six hundred ninety-seven million, one hundred eighty-one thousand, three hundred twelve".