2134731837661 has 2 divisors, whose sum is σ = 2134731837662. Its totient is φ = 2134731837660.

The previous prime is 2134731837649. The next prime is 2134731837703. The reversal of 2134731837661 is 1667381374312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1463299089561 + 671432748100 = 1209669^2 + 819410^2 .

It is a cyclic number.

It is not a de Polignac number, because 2134731837661 - 2⁷ = 2134731837533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2134731837599 and 2134731837608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2134731837611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067365918830 + 1067365918831.

It is an arithmetic number, because the mean of its divisors is an integer number (1067365918831).

Almost surely, 2^{2134731837661} is an apocalyptic number.

It is an amenable number.

2134731837661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2134731837661 is an equidigital number, since it uses as much as digits as its factorization.

2134731837661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 52.

The spelling of 2134731837661 in words is "two trillion, one hundred thirty-four billion, seven hundred thirty-one million, eight hundred thirty-seven thousand, six hundred sixty-one".