1681054635 has 32 divisors (see below), whose sum is σ = 2900072448. Its totient is φ = 826600320.

The previous prime is 1681054631. The next prime is 1681054649. The reversal of 1681054635 is 5364501861.

It is not a de Polignac number, because 1681054635 - 2² = 1681054631 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1681054593 and 1681054602.

It is not an unprimeable number, because it can be changed into a prime (1681054631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 172914 + ... + 182376.

It is an arithmetic number, because the mean of its divisors is an integer number (90627264).

Almost surely, 2^1681054635 is an apocalyptic number.

1681054635 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1681054635 is a deficient number, since it is larger than the sum of its proper divisors (1219017813).

1681054635 is a wasteful number, since it uses less digits than its factorization.

1681054635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10395.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 1681054635 is about 41000.6662750741. Note that the first 3 decimals coincide. The cubic root of 1681054635 is about 1189.0330951895.

The spelling of 1681054635 in words is "one billion, six hundred eighty-one million, fifty-four thousand, six hundred thirty-five".