2145661503103 has 2 divisors, whose sum is σ = 2145661503104. Its totient is φ = 2145661503102.

The previous prime is 2145661503101. The next prime is 2145661503131. The reversal of 2145661503103 is 3013051665412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145661503103 - 2¹ = 2145661503101 is a prime.

Together with 2145661503101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145661503101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072830751551 + 1072830751552.

It is an arithmetic number, because the mean of its divisors is an integer number (1072830751552).

Almost surely, 2^{2145661503103} is an apocalyptic number.

2145661503103 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145661503103 is an equidigital number, since it uses as much as digits as its factorization.

2145661503103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 2145661503103 in words is "two trillion, one hundred forty-five billion, six hundred sixty-one million, five hundred three thousand, one hundred three".