681201534 has 64 divisors (see below), whose sum is σ = 1536288768. Its totient is φ = 199795200.

The previous prime is 681201481. The next prime is 681201559. The reversal of 681201534 is 435102186.

It is a congruent number.

It is an unprimeable number.

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, 772774 + ... + 773654.

It is an arithmetic number, because the mean of its divisors is an integer number (24004512).

Almost surely, 2^681201534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681201534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (768144384).

681201534 is an abundant number, since it is smaller than the sum of its proper divisors (855087234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681201534 is a wasteful number, since it uses less digits than its factorization.

681201534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 681201534 is about 26099.8378155881. The cubic root of 681201534 is about 879.8835650012.

The spelling of 681201534 in words is "six hundred eighty-one million, two hundred one thousand, five hundred thirty-four".