2157130032649 has 2 divisors, whose sum is σ = 2157130032650. Its totient is φ = 2157130032648.

The previous prime is 2157130032511. The next prime is 2157130032677. The reversal of 2157130032649 is 9462300317512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1393891919424 + 763238113225 = 1180632^2 + 873635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2157130032649 is a prime.

It is not a weakly prime, because it can be changed into another prime (2157130032149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078565016324 + 1078565016325.

It is an arithmetic number, because the mean of its divisors is an integer number (1078565016325).

Almost surely, 2^{2157130032649} is an apocalyptic number.

It is an amenable number.

2157130032649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157130032649 is an equidigital number, since it uses as much as digits as its factorization.

2157130032649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 2157130032649 in words is "two trillion, one hundred fifty-seven billion, one hundred thirty million, thirty-two thousand, six hundred forty-nine".