775423240931 has 4 divisors (see below), whose sum is σ = 783100698864. Its totient is φ = 767745783000.

The previous prime is 775423240897. The next prime is 775423240981. The reversal of 775423240931 is 139042324577.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 775423240931 - 2³⁰ = 774349499107 is a prime.

It is a super-2 number, since 2×775423240931² (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 (775423240981) 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, 3838728815 + ... + 3838729016.

It is an arithmetic number, because the mean of its divisors is an integer number (195775174716).

Almost surely, 2^775423240931 is an apocalyptic number.

775423240931 is a deficient number, since it is larger than the sum of its proper divisors (7677457933).

775423240931 is a wasteful number, since it uses less digits than its factorization.

775423240931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7677457932.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The spelling of 775423240931 in words is "seven hundred seventy-five billion, four hundred twenty-three million, two hundred forty thousand, nine hundred thirty-one".