2503661543 has 4 divisors (see below), whose sum is σ = 2504916000. Its totient is φ = 2502407088.

The previous prime is 2503661533. The next prime is 2503661549. The reversal of 2503661543 is 3451663052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2503661543 - 2⁸ = 2503661287 is a prime.

It is a super-2 number, since 2×2503661543² = 12536642243794281698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2503661549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624230 + ... + 628227.

It is an arithmetic number, because the mean of its divisors is an integer number (626229000).

Almost surely, 2^2503661543 is an apocalyptic number.

2503661543 is a deficient number, since it is larger than the sum of its proper divisors (1254457).

2503661543 is a wasteful number, since it uses less digits than its factorization.

2503661543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254456.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 2503661543 is about 50036.6020329119. The cubic root of 2503661543 is about 1357.8710821982.

The spelling of 2503661543 in words is "two billion, five hundred three million, six hundred sixty-one thousand, five hundred forty-three".