1867201695761 has 2 divisors, whose sum is σ = 1867201695762. Its totient is φ = 1867201695760.

The previous prime is 1867201695727. The next prime is 1867201695769. The reversal of 1867201695761 is 1675961027681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1641985960000 + 225215735761 = 1281400^2 + 474569^2 .

It is a cyclic number.

It is not a de Polignac number, because 1867201695761 - 2¹⁴ = 1867201679377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1867201695761.

It is not a weakly prime, because it can be changed into another prime (1867201695769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 933600847880 + 933600847881.

It is an arithmetic number, because the mean of its divisors is an integer number (933600847881).

Almost surely, 2^{1867201695761} is an apocalyptic number.

It is an amenable number.

1867201695761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1867201695761 is an equidigital number, since it uses as much as digits as its factorization.

1867201695761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 59.

The spelling of 1867201695761 in words is "one trillion, eight hundred sixty-seven billion, two hundred one million, six hundred ninety-five thousand, seven hundred sixty-one".