261047677 has 8 divisors (see below), whose sum is σ = 297161280. Its totient is φ = 226997760.

The previous prime is 261047671. The next prime is 261047687. The reversal of 261047677 is 776740162.

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

It is a de Polignac number, because none of the positive numbers 2^k-261047677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261047671) 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, 515652 + ... + 516157.

It is an arithmetic number, because the mean of its divisors is an integer number (37145160).

Almost surely, 2^261047677 is an apocalyptic number.

It is an amenable number.

261047677 is a deficient number, since it is larger than the sum of its proper divisors (36113603).

261047677 is a wasteful number, since it uses less digits than its factorization.

261047677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031843.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 261047677 is about 16156.9699201304. The cubic root of 261047677 is about 639.1065634062.

The spelling of 261047677 in words is "two hundred sixty-one million, forty-seven thousand, six hundred seventy-seven".