1406154301661 has 2 divisors, whose sum is σ = 1406154301662. Its totient is φ = 1406154301660.

The previous prime is 1406154301619. The next prime is 1406154301771. The reversal of 1406154301661 is 1661034516041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1406014920025 + 139381636 = 1185755^2 + 11806^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406154301661 - 2⁶ = 1406154301597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1406154301061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703077150830 + 703077150831.

It is an arithmetic number, because the mean of its divisors is an integer number (703077150831).

Almost surely, 2^{1406154301661} is an apocalyptic number.

It is an amenable number.

1406154301661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406154301661 is an equidigital number, since it uses as much as digits as its factorization.

1406154301661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 1406154301661 in words is "one trillion, four hundred six billion, one hundred fifty-four million, three hundred one thousand, six hundred sixty-one".