681903595062 has 128 divisors (see below), whose sum is σ = 1685001600000. Its totient is φ = 205974879264.

The previous prime is 681903595033. The next prime is 681903595067. The reversal of 681903595062 is 260595309186.

It is a happy number.

681903595062 is a `hidden beast` number, since 6 + 81 + 9 + 0 + 3 + 59 + 506 + 2 = 666.

It is a super-3 number, since 3×681903595062³ (a number of 36 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681903595067) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1733064 + ... + 2089812.

It is an arithmetic number, because the mean of its divisors is an integer number (13164075000).

Almost surely, 2^681903595062 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681903595062, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (842500800000).

681903595062 is an abundant number, since it is smaller than the sum of its proper divisors (1003098004938).

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

681903595062 is a wasteful number, since it uses less digits than its factorization.

681903595062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356814 (or 356796 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 681903595062 in words is "six hundred eighty-one billion, nine hundred three million, five hundred ninety-five thousand, sixty-two".