261006763 has 8 divisors (see below), whose sum is σ = 285275520. Its totient is φ = 237728640.

The previous prime is 261006719. The next prime is 261006773. The reversal of 261006763 is 367600162.

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 261006763 - 2¹³ = 260998571 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261006703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247108 + ... + 248161.

It is an arithmetic number, because the mean of its divisors is an integer number (35659440).

Almost surely, 2^261006763 is an apocalyptic number.

261006763 is a deficient number, since it is larger than the sum of its proper divisors (24268757).

261006763 is a wasteful number, since it uses less digits than its factorization.

261006763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495317.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 261006763 is about 16155.7037296430. The cubic root of 261006763 is about 639.0731726065.

The spelling of 261006763 in words is "two hundred sixty-one million, six thousand, seven hundred sixty-three".