1406775640261 has 2 divisors, whose sum is σ = 1406775640262. Its totient is φ = 1406775640260.

The previous prime is 1406775640159. The next prime is 1406775640297. The reversal of 1406775640261 is 1620465776041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1358404236036 + 48371404225 = 1165506^2 + 219935^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406775640261 - 2⁷ = 1406775640133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1406775640561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703387820130 + 703387820131.

It is an arithmetic number, because the mean of its divisors is an integer number (703387820131).

Almost surely, 2^{1406775640261} is an apocalyptic number.

It is an amenable number.

1406775640261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406775640261 is an equidigital number, since it uses as much as digits as its factorization.

1406775640261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 1406775640261 in words is "one trillion, four hundred six billion, seven hundred seventy-five million, six hundred forty thousand, two hundred sixty-one".