641971503 has 12 divisors (see below), whose sum is σ = 942494488. Its totient is φ = 420964560.

The previous prime is 641971471. The next prime is 641971513. The reversal of 641971503 is 305179146.

641971503 is a `hidden beast` number, since 64 + 1 + 97 + 1 + 503 = 666.

It is not a de Polignac number, because 641971503 - 2⁵ = 641971471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641971513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 584125 + ... + 585222.

Almost surely, 2^641971503 is an apocalyptic number.

641971503 is a deficient number, since it is larger than the sum of its proper divisors (300522985).

641971503 is a wasteful number, since it uses less digits than its factorization.

641971503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169414 (or 1169411 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 641971503 is about 25337.1565689601. The cubic root of 641971503 is about 862.6578594487.

The spelling of 641971503 in words is "six hundred forty-one million, nine hundred seventy-one thousand, five hundred three".