681113500 has 96 divisors (see below), whose sum is σ = 1586475072. Its totient is φ = 254566400.

The previous prime is 681113473. The next prime is 681113509. The reversal of 681113500 is 5311186.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681113509) 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, 1929324 + ... + 1929676.

It is an arithmetic number, because the mean of its divisors is an integer number (16525782).

Almost surely, 2^681113500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681113500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (793237536).

681113500 is an abundant number, since it is smaller than the sum of its proper divisors (905361572).

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

681113500 is a wasteful number, since it uses less digits than its factorization.

681113500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616 (or 604 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 681113500 is about 26098.1512755214. The cubic root of 681113500 is about 879.8456599159.

Adding to 681113500 its reverse (5311186), we get a palindrome (686424686).

The spelling of 681113500 in words is "six hundred eighty-one million, one hundred thirteen thousand, five hundred".