680197551 has 16 divisors (see below), whose sum is σ = 990361728. Its totient is φ = 411831200.

The previous prime is 680197543. The next prime is 680197559. The reversal of 680197551 is 155791086.

It is an interprime number because it is at equal distance from previous prime (680197543) and next prime (680197559).

It is not a de Polignac number, because 680197551 - 2³ = 680197543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680197559) 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, 25300 + ... + 44726.

It is an arithmetic number, because the mean of its divisors is an integer number (61897608).

Almost surely, 2^680197551 is an apocalyptic number.

680197551 is a deficient number, since it is larger than the sum of its proper divisors (310164177).

680197551 is a wasteful number, since it uses less digits than its factorization.

680197551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20502.

The product of its (nonzero) digits is 75600, while the sum is 42.

The square root of 680197551 is about 26080.5972132541. The cubic root of 680197551 is about 879.4510828628.

The spelling of 680197551 in words is "six hundred eighty million, one hundred ninety-seven thousand, five hundred fifty-one".