771491332627 has 4 divisors (see below), whose sum is σ = 771684161256. Its totient is φ = 771298504000.

The previous prime is 771491332607. The next prime is 771491332631. The reversal of 771491332627 is 726233194177.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-771491332627 is a prime.

It is a super-2 number, since 2×771491332627² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (771491332607) 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, 96408313 + ... + 96416314.

It is an arithmetic number, because the mean of its divisors is an integer number (192921040314).

Almost surely, 2^771491332627 is an apocalyptic number.

771491332627 is a deficient number, since it is larger than the sum of its proper divisors (192828629).

771491332627 is a wasteful number, since it uses less digits than its factorization.

771491332627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192828628.

The product of its digits is 2667168, while the sum is 52.

The spelling of 771491332627 in words is "seven hundred seventy-one billion, four hundred ninety-one million, three hundred thirty-two thousand, six hundred twenty-seven".