1681695525 has 48 divisors (see below), whose sum is σ = 2829144320. Its totient is φ = 881280000.

The previous prime is 1681695479. The next prime is 1681695527. The reversal of 1681695525 is 5255961861.

It is not a de Polignac number, because 1681695525 - 2⁹ = 1681695013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681695527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2238900 + ... + 2239650.

Almost surely, 2^1681695525 is an apocalyptic number.

1681695525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1681695525 is a deficient number, since it is larger than the sum of its proper divisors (1147448795).

1681695525 is a wasteful number, since it uses less digits than its factorization.

1681695525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246 (or 1241 counting only the distinct ones).

The product of its digits is 648000, while the sum is 48.

The square root of 1681695525 is about 41008.4811350043. The cubic root of 1681695525 is about 1189.1841794323.

The spelling of 1681695525 in words is "one billion, six hundred eighty-one million, six hundred ninety-five thousand, five hundred twenty-five".