688100007881 has 48 divisors (see below), whose sum is σ = 851403208320. Its totient is φ = 547222832640.

The previous prime is 688100007869. The next prime is 688100007899. The reversal of 688100007881 is 188700001886.

It is not a de Polignac number, because 688100007881 - 2³⁴ = 670920138697 is a prime.

It is a super-2 number, since 2×688100007881² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688100007821) 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, 39067805 + ... + 39085413.

It is an arithmetic number, because the mean of its divisors is an integer number (17737566840).

Almost surely, 2^688100007881 is an apocalyptic number.

It is an amenable number.

688100007881 is a deficient number, since it is larger than the sum of its proper divisors (163303200439).

688100007881 is a wasteful number, since it uses less digits than its factorization.

688100007881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17874 (or 17765 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 47.

The spelling of 688100007881 in words is "six hundred eighty-eight billion, one hundred million, seven thousand, eight hundred eighty-one".