775396641 has 4 divisors (see below), whose sum is σ = 1033862192. Its totient is φ = 516931092.

The previous prime is 775396637. The next prime is 775396649. The reversal of 775396641 is 146693577.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 146693577 = 3 ⋅48897859.

It is not a de Polignac number, because 775396641 - 2² = 775396637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775396649) 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, 129232771 + ... + 129232776.

It is an arithmetic number, because the mean of its divisors is an integer number (258465548).

Almost surely, 2^775396641 is an apocalyptic number.

It is an amenable number.

775396641 is a deficient number, since it is larger than the sum of its proper divisors (258465551).

775396641 is a wasteful number, since it uses less digits than its factorization.

775396641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258465550.

The product of its digits is 952560, while the sum is 48.

The square root of 775396641 is about 27845.9447855518. The cubic root of 775396641 is about 918.7019505252.

The spelling of 775396641 in words is "seven hundred seventy-five million, three hundred ninety-six thousand, six hundred forty-one".