775385613 has 12 divisors (see below), whose sum is σ = 1128178428. Its totient is φ = 513149760.

The previous prime is 775385603. The next prime is 775385647. The reversal of 775385613 is 316583577.

It can be written as a sum of positive squares in 2 ways, for example, as 637158564 + 138227049 = 25242^2 + 11757^2 .

It is not a de Polignac number, because 775385613 - 2²⁶ = 708276749 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775385603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313198 + ... + 315663.

It is an arithmetic number, because the mean of its divisors is an integer number (94014869).

Almost surely, 2^775385613 is an apocalyptic number.

It is an amenable number.

775385613 is a deficient number, since it is larger than the sum of its proper divisors (352792815).

775385613 is a wasteful number, since it uses less digits than its factorization.

775385613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629004 (or 629001 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 775385613 is about 27845.7467667865. The cubic root of 775385613 is about 918.6975951228.

The spelling of 775385613 in words is "seven hundred seventy-five million, three hundred eighty-five thousand, six hundred thirteen".