261055356747 has 8 divisors (see below), whose sum is σ = 349330394256. Its totient is φ = 173408611872.

The previous prime is 261055356739. The next prime is 261055356827. The reversal of 261055356747 is 747653550162.

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

It is not a de Polignac number, because 261055356747 - 2³ = 261055356739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261055356747.

It is not an unprimeable number, because it can be changed into a prime (261055356847) 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, 157072188 + ... + 157073849.

It is an arithmetic number, because the mean of its divisors is an integer number (43666299282).

Almost surely, 2^261055356747 is an apocalyptic number.

261055356747 is a deficient number, since it is larger than the sum of its proper divisors (88275037509).

261055356747 is a wasteful number, since it uses less digits than its factorization.

261055356747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314146317.

The product of its (nonzero) digits is 5292000, while the sum is 51.

The spelling of 261055356747 in words is "two hundred sixty-one billion, fifty-five million, three hundred fifty-six thousand, seven hundred forty-seven".