688195137632 has 12 divisors (see below), whose sum is σ = 1354884177276. Its totient is φ = 344097568800.

The previous prime is 688195137613. The next prime is 688195137649. The reversal of 688195137632 is 236731591886.

It is a happy number.

It is a super-2 number, since 2×688195137632² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10753048994 + ... + 10753049057.

It is an arithmetic number, because the mean of its divisors is an integer number (112907014773).

Almost surely, 2^688195137632 is an apocalyptic number.

It is an amenable number.

688195137632 is a deficient number, since it is larger than the sum of its proper divisors (666689039644).

688195137632 is a wasteful number, since it uses less digits than its factorization.

688195137632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21506098061 (or 21506098053 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 59.

The spelling of 688195137632 in words is "six hundred eighty-eight billion, one hundred ninety-five million, one hundred thirty-seven thousand, six hundred thirty-two".