1680326501 has 4 divisors (see below), whose sum is σ = 1920373152. Its totient is φ = 1440279852.

The previous prime is 1680326489. The next prime is 1680326533. The reversal of 1680326501 is 1056230861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1680326501 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 (1680325501) 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, 120023315 + ... + 120023328.

It is an arithmetic number, because the mean of its divisors is an integer number (480093288).

Almost surely, 2^1680326501 is an apocalyptic number.

It is an amenable number.

1680326501 is a deficient number, since it is larger than the sum of its proper divisors (240046651).

1680326501 is an equidigital number, since it uses as much as digits as its factorization.

1680326501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240046650.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1680326501 is about 40991.7857747135. The cubic root of 1680326501 is about 1188.8613973285.

The spelling of 1680326501 in words is "one billion, six hundred eighty million, three hundred twenty-six thousand, five hundred one".