680725515 has 16 divisors (see below), whose sum is σ = 1092307968. Its totient is φ = 362004576.

The previous prime is 680725499. The next prime is 680725523. The reversal of 680725515 is 515527086.

It is not a de Polignac number, because 680725515 - 2⁴ = 680725499 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60187 + ... + 70596.

It is an arithmetic number, because the mean of its divisors is an integer number (68269248).

Almost surely, 2^680725515 is an apocalyptic number.

680725515 is a deficient number, since it is larger than the sum of its proper divisors (411582453).

680725515 is a wasteful number, since it uses less digits than its factorization.

680725515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131138.

The product of its (nonzero) digits is 84000, while the sum is 39.

The square root of 680725515 is about 26090.7170273260. The cubic root of 680725515 is about 879.6785650255.

The spelling of 680725515 in words is "six hundred eighty million, seven hundred twenty-five thousand, five hundred fifteen".