681100235827 has 16 divisors (see below), whose sum is σ = 783982552320. Its totient is φ = 585200095200.

The previous prime is 681100235807. The next prime is 681100235839. The reversal of 681100235827 is 728532001186.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681100235827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681100235807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3782383 + ... + 3958360.

It is an arithmetic number, because the mean of its divisors is an integer number (48998909520).

Almost surely, 2^681100235827 is an apocalyptic number.

681100235827 is a deficient number, since it is larger than the sum of its proper divisors (102882316493).

681100235827 is a wasteful number, since it uses less digits than its factorization.

681100235827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7741194.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 681100235827 in words is "six hundred eighty-one billion, one hundred million, two hundred thirty-five thousand, eight hundred twenty-seven".