1261161862967 has 2 divisors, whose sum is σ = 1261161862968. Its totient is φ = 1261161862966.

The previous prime is 1261161862957. The next prime is 1261161863053. The reversal of 1261161862967 is 7692681611621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1261161862967 - 2⁶ = 1261161862903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1261161862937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630580931483 + 630580931484.

It is an arithmetic number, because the mean of its divisors is an integer number (630580931484).

Almost surely, 2^{1261161862967} is an apocalyptic number.

1261161862967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261161862967 is an equidigital number, since it uses as much as digits as its factorization.

1261161862967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 56.

The spelling of 1261161862967 in words is "one trillion, two hundred sixty-one billion, one hundred sixty-one million, eight hundred sixty-two thousand, nine hundred sixty-seven".