2103307936649 has 2 divisors, whose sum is σ = 2103307936650. Its totient is φ = 2103307936648.

The previous prime is 2103307936637. The next prime is 2103307936669. The reversal of 2103307936649 is 9466397033012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1139838087424 + 963469849225 = 1067632^2 + 981565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2103307936649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2103307936649.

It is not a weakly prime, because it can be changed into another prime (2103307936669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051653968324 + 1051653968325.

It is an arithmetic number, because the mean of its divisors is an integer number (1051653968325).

Almost surely, 2^{2103307936649} is an apocalyptic number.

It is an amenable number.

2103307936649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103307936649 is an equidigital number, since it uses as much as digits as its factorization.

2103307936649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4408992, while the sum is 53.

The spelling of 2103307936649 in words is "two trillion, one hundred three billion, three hundred seven million, nine hundred thirty-six thousand, six hundred forty-nine".