261655430130053 has 2 divisors, whose sum is σ = 261655430130054. Its totient is φ = 261655430130052.

The previous prime is 261655430130049. The next prime is 261655430130089. The reversal of 261655430130053 is 350031034556162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190463129502244 + 71192300627809 = 13800838^2 + 8437553^2 .

It is a cyclic number.

It is not a de Polignac number, because 261655430130053 - 2² = 261655430130049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261655430129986 and 261655430130013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261655430130553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130827715065026 + 130827715065027.

It is an arithmetic number, because the mean of its divisors is an integer number (130827715065027).

Almost surely, 2^{261655430130053} is an apocalyptic number.

It is an amenable number.

261655430130053 is a deficient number, since it is larger than the sum of its proper divisors (1).

261655430130053 is an equidigital number, since it uses as much as digits as its factorization.

261655430130053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972000, while the sum is 44.

The spelling of 261655430130053 in words is "two hundred sixty-one trillion, six hundred fifty-five billion, four hundred thirty million, one hundred thirty thousand, fifty-three".