261647526223731 has 8 divisors (see below), whose sum is σ = 348863455229584. Its totient is φ = 174431640683520.

The previous prime is 261647526223703. The next prime is 261647526223753. The reversal of 261647526223731 is 137322625746162.

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

It is not a de Polignac number, because 261647526223731 - 2¹⁸ = 261647525961587 is a prime.

It is a super-2 number, since 2×261647526223731² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261647526223331) 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, 7721955 + ... + 24143811.

It is an arithmetic number, because the mean of its divisors is an integer number (43607931903698).

Almost surely, 2^{261647526223731} is an apocalyptic number.

261647526223731 is a deficient number, since it is larger than the sum of its proper divisors (87215929005853).

261647526223731 is a wasteful number, since it uses less digits than its factorization.

261647526223731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21732821.

The product of its digits is 30481920, while the sum is 57.

The spelling of 261647526223731 in words is "two hundred sixty-one trillion, six hundred forty-seven billion, five hundred twenty-six million, two hundred twenty-three thousand, seven hundred thirty-one".