687356820470 has 16 divisors (see below), whose sum is σ = 1239069825648. Its totient is φ = 274536606240.

The previous prime is 687356820439. The next prime is 687356820481. The reversal of 687356820470 is 74028653786.

It is a super-2 number, since 2×687356820470² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50758136 + ... + 50771675.

It is an arithmetic number, because the mean of its divisors is an integer number (77441864103).

Almost surely, 2^687356820470 is an apocalyptic number.

687356820470 is a deficient number, since it is larger than the sum of its proper divisors (551713005178).

687356820470 is a wasteful number, since it uses less digits than its factorization.

687356820470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101530495.

The product of its (nonzero) digits is 13547520, while the sum is 56.

The spelling of 687356820470 in words is "six hundred eighty-seven billion, three hundred fifty-six million, eight hundred twenty thousand, four hundred seventy".