261534253704677 has 8 divisors (see below), whose sum is σ = 288958561638336. Its totient is φ = 235447716889792.

The previous prime is 261534253704649. The next prime is 261534253704709. The reversal of 261534253704677 is 776407352435162.

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 261534253704677 - 2⁸ = 261534253704421 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 (261534253704077) 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, 334442779283 + ... + 334442780064.

It is an arithmetic number, because the mean of its divisors is an integer number (36119820204792).

Almost surely, 2^{261534253704677} is an apocalyptic number.

It is an amenable number.

261534253704677 is a deficient number, since it is larger than the sum of its proper divisors (27424307933659).

261534253704677 is a wasteful number, since it uses less digits than its factorization.

261534253704677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668885559387.

The product of its (nonzero) digits is 177811200, while the sum is 62.

The spelling of 261534253704677 in words is "two hundred sixty-one trillion, five hundred thirty-four billion, two hundred fifty-three million, seven hundred four thousand, six hundred seventy-seven".