256164640541 has 8 divisors (see below), whose sum is σ = 267315189504. Its totient is φ = 245015171280.

The previous prime is 256164640513. The next prime is 256164640549. The reversal of 256164640541 is 145046461652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256164640541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256164640492 and 256164640501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256164640549) 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, 235031 + ... + 753371.

It is an arithmetic number, because the mean of its divisors is an integer number (33414398688).

Almost surely, 2^256164640541 is an apocalyptic number.

It is an amenable number.

256164640541 is a deficient number, since it is larger than the sum of its proper divisors (11150548963).

256164640541 is a wasteful number, since it uses less digits than its factorization.

256164640541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539851.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 256164640541 in words is "two hundred fifty-six billion, one hundred sixty-four million, six hundred forty thousand, five hundred forty-one".