775640136 has 48 divisors (see below), whose sum is σ = 1957185360. Its totient is φ = 256157440.

The previous prime is 775640123. The next prime is 775640141. The reversal of 775640136 is 631046577.

It is a junction number, because it is equal to n+sod(n) for n = 775640094 and 775640103.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305191 + ... + 307721.

It is an arithmetic number, because the mean of its divisors is an integer number (40774695).

Almost surely, 2^775640136 is an apocalyptic number.

It is an amenable number.

775640136 is an abundant number, since it is smaller than the sum of its proper divisors (1181545224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

775640136 is a wasteful number, since it uses less digits than its factorization.

775640136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766 (or 2649 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 775640136 is about 27850.3166229758. The cubic root of 775640136 is about 918.7981060100.

The spelling of 775640136 in words is "seven hundred seventy-five million, six hundred forty thousand, one hundred thirty-six".