3661000210503 has 40 divisors (see below), whose sum is σ = 5797588492080. Its totient is φ = 2294326529280.

The previous prime is 3661000210489. The next prime is 3661000210507. The reversal of 3661000210503 is 3050120001663.

3661000210503 is a `hidden beast` number, since 36 + 6 + 100 + 0 + 21 + 0 + 503 = 666.

It is not a de Polignac number, because 3661000210503 - 2³² = 3656705243207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661000210507) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 462013 + ... + 2745078.

It is an arithmetic number, because the mean of its divisors is an integer number (144939712302).

Almost surely, 2^{3661000210503} is an apocalyptic number.

3661000210503 is a deficient number, since it is larger than the sum of its proper divisors (2136588281577).

3661000210503 is a wasteful number, since it uses less digits than its factorization.

3661000210503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207949 (or 3207940 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The spelling of 3661000210503 in words is "three trillion, six hundred sixty-one billion, two hundred ten thousand, five hundred three".