1681274529 has 32 divisors (see below), whose sum is σ = 2721686400. Its totient is φ = 1017276480.

The previous prime is 1681274509. The next prime is 1681274537. The reversal of 1681274529 is 9254721861.

It is not a de Polignac number, because 1681274529 - 2⁹ = 1681274017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1681274509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 189607 + ... + 198275.

It is an arithmetic number, because the mean of its divisors is an integer number (85052700).

Almost surely, 2^1681274529 is an apocalyptic number.

It is an amenable number.

1681274529 is a deficient number, since it is larger than the sum of its proper divisors (1040411871).

1681274529 is a wasteful number, since it uses less digits than its factorization.

1681274529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9342 (or 9336 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 1681274529 is about 41003.3477779559. The cubic root of 1681274529 is about 1189.0849376140.

The spelling of 1681274529 in words is "one billion, six hundred eighty-one million, two hundred seventy-four thousand, five hundred twenty-nine".