264692390691 has 8 divisors (see below), whose sum is σ = 353458733760. Its totient is φ = 176193820712.

The previous prime is 264692390621. The next prime is 264692390717. The reversal of 264692390691 is 196093296462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 264692390691 - 2¹¹ = 264692388643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (264692390621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66940965 + ... + 66944918.

It is an arithmetic number, because the mean of its divisors is an integer number (44182341720).

Almost surely, 2^264692390691 is an apocalyptic number.

264692390691 is a deficient number, since it is larger than the sum of its proper divisors (88766343069).

264692390691 is a wasteful number, since it uses less digits than its factorization.

264692390691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133886545.

The product of its (nonzero) digits is 7558272, while the sum is 57.

The spelling of 264692390691 in words is "two hundred sixty-four billion, six hundred ninety-two million, three hundred ninety thousand, six hundred ninety-one".