1680626901 has 8 divisors (see below), whose sum is σ = 2313121024. Its totient is φ = 1084275360.

The previous prime is 1680626869. The next prime is 1680626917. The reversal of 1680626901 is 1096260861.

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

It is not a de Polignac number, because 1680626901 - 2⁵ = 1680626869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1680626901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680622901) 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, 9035536 + ... + 9035721.

It is an arithmetic number, because the mean of its divisors is an integer number (289140128).

Almost surely, 2^1680626901 is an apocalyptic number.

It is an amenable number.

1680626901 is a deficient number, since it is larger than the sum of its proper divisors (632494123).

1680626901 is a wasteful number, since it uses less digits than its factorization.

1680626901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18071291.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1680626901 is about 40995.4497596989. The cubic root of 1680626901 is about 1188.9322392519.

The spelling of 1680626901 in words is "one billion, six hundred eighty million, six hundred twenty-six thousand, nine hundred one".