1354042720661 has 2 divisors, whose sum is σ = 1354042720662. Its totient is φ = 1354042720660.

The previous prime is 1354042720649. The next prime is 1354042720673. The reversal of 1354042720661 is 1660272404531.

It is a balanced prime because it is at equal distance from previous prime (1354042720649) and next prime (1354042720673).

It can be written as a sum of positive squares in only one way, i.e., 1326712348900 + 27330371761 = 1151830^2 + 165319^2 .

It is a cyclic number.

It is not a de Polignac number, because 1354042720661 - 2³⁴ = 1336862851477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1354042720621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677021360330 + 677021360331.

It is an arithmetic number, because the mean of its divisors is an integer number (677021360331).

Almost surely, 2^{1354042720661} is an apocalyptic number.

It is an amenable number.

1354042720661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1354042720661 is an equidigital number, since it uses as much as digits as its factorization.

1354042720661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 1354042720661 in words is "one trillion, three hundred fifty-four billion, forty-two million, seven hundred twenty thousand, six hundred sixty-one".