77475522641 has 4 divisors (see below), whose sum is σ = 84518751984. Its totient is φ = 70432293300.

The previous prime is 77475522637. The next prime is 77475522673. The reversal of 77475522641 is 14622557477.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77475522641 - 2² = 77475522637 is a prime.

It is a super-2 number, since 2×77475522641² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77475522641.

It is not an unprimeable number, because it can be changed into a prime (77475522841) 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, 3521614655 + ... + 3521614676.

It is an arithmetic number, because the mean of its divisors is an integer number (21129687996).

Almost surely, 2^77475522641 is an apocalyptic number.

It is an amenable number.

77475522641 is a deficient number, since it is larger than the sum of its proper divisors (7043229343).

77475522641 is a wasteful number, since it uses less digits than its factorization.

77475522641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7043229342.

The product of its digits is 3292800, while the sum is 50.

The spelling of 77475522641 in words is "seventy-seven billion, four hundred seventy-five million, five hundred twenty-two thousand, six hundred forty-one".