261646070160451 has 2 divisors, whose sum is σ = 261646070160452. Its totient is φ = 261646070160450.

The previous prime is 261646070160427. The next prime is 261646070160479. The reversal of 261646070160451 is 154061070646162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261646070160451 - 2⁷ = 261646070160323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261646070160395 and 261646070160404.

It is not a weakly prime, because it can be changed into another prime (261646070160851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130823035080225 + 130823035080226.

It is an arithmetic number, because the mean of its divisors is an integer number (130823035080226).

Almost surely, 2^{261646070160451} is an apocalyptic number.

261646070160451 is a deficient number, since it is larger than the sum of its proper divisors (1).

261646070160451 is an equidigital number, since it uses as much as digits as its factorization.

261646070160451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 261646070160451 in words is "two hundred sixty-one trillion, six hundred forty-six billion, seventy million, one hundred sixty thousand, four hundred fifty-one".