1641202501 has 8 divisors (see below), whose sum is σ = 1738183520. Its totient is φ = 1545281712.

The previous prime is 1641202471. The next prime is 1641202573. The reversal of 1641202501 is 1052021461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1641202501 - 2⁷ = 1641202373 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 (1641202001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261870 + ... + 268063.

It is an arithmetic number, because the mean of its divisors is an integer number (217272940).

Almost surely, 2^1641202501 is an apocalyptic number.

It is an amenable number.

1641202501 is a deficient number, since it is larger than the sum of its proper divisors (96981019).

1641202501 is a wasteful number, since it uses less digits than its factorization.

1641202501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530115.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1641202501 is about 40511.7575649342. The cubic root of 1641202501 is about 1179.5618647747.

Adding to 1641202501 its reverse (1052021461), we get a palindrome (2693223962).

The spelling of 1641202501 in words is "one billion, six hundred forty-one million, two hundred two thousand, five hundred one".