261451127510431 has 8 divisors (see below), whose sum is σ = 261506019640320. Its totient is φ = 261396241160952.

The previous prime is 261451127510411. The next prime is 261451127510453. The reversal of 261451127510431 is 134015721154162.

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 261451127510431 - 2¹⁹ = 261451126986143 is a prime.

It is a super-2 number, since 2×261451127510431² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261451127510401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89626890 + ... + 92498008.

It is an arithmetic number, because the mean of its divisors is an integer number (32688252455040).

Almost surely, 2^{261451127510431} is an apocalyptic number.

261451127510431 is a deficient number, since it is larger than the sum of its proper divisors (54892129889).

261451127510431 is an equidigital number, since it uses as much as digits as its factorization.

261451127510431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890205.

The product of its (nonzero) digits is 201600, while the sum is 43.

Adding to 261451127510431 its reverse (134015721154162), we get a palindrome (395466848664593).

The spelling of 261451127510431 in words is "two hundred sixty-one trillion, four hundred fifty-one billion, one hundred twenty-seven million, five hundred ten thousand, four hundred thirty-one".