768640901 has 12 divisors (see below), whose sum is σ = 903356748. Its totient is φ = 652038912.

The previous prime is 768640889. The next prime is 768640921. The reversal of 768640901 is 109046867.

It can be written as a sum of positive squares in 2 ways, for example, as 484044001 + 284596900 = 22001^2 + 16870^2 .

It is not a de Polignac number, because 768640901 - 2⁶ = 768640837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768640921) 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, 76106 + ... + 85611.

It is an arithmetic number, because the mean of its divisors is an integer number (75279729).

Almost surely, 2^768640901 is an apocalyptic number.

It is an amenable number.

768640901 is a deficient number, since it is larger than the sum of its proper divisors (134715847).

768640901 is a wasteful number, since it uses less digits than its factorization.

768640901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161828 (or 161821 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 768640901 is about 27724.3737711062. The cubic root of 768640901 is about 916.0260622785.

The spelling of 768640901 in words is "seven hundred sixty-eight million, six hundred forty thousand, nine hundred one".