681213883548 has 144 divisors (see below), whose sum is σ = 1831402016640. Its totient is φ = 195420988800.

The previous prime is 681213883547. The next prime is 681213883561. The reversal of 681213883548 is 845388312186.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681213883541) 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, 77239483 + ... + 77248301.

It is an arithmetic number, because the mean of its divisors is an integer number (12718069560).

Almost surely, 2^681213883548 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 681213883548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (915701008320).

681213883548 is an abundant number, since it is smaller than the sum of its proper divisors (1150188133092).

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

681213883548 is a wasteful number, since it uses less digits than its factorization.

681213883548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10496 (or 10475 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 57.

The spelling of 681213883548 in words is "six hundred eighty-one billion, two hundred thirteen million, eight hundred eighty-three thousand, five hundred forty-eight".