687668730054 has 8 divisors (see below), whose sum is σ = 1375337460120. Its totient is φ = 229222910016.

The previous prime is 687668730053. The next prime is 687668730101. The reversal of 687668730054 is 450037866786.

It is a sphenic number, since it is the product of 3 distinct primes.

687668730054 is an admirable number.

It is a super-2 number, since 2×687668730054² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 687668730054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687668730053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57305727499 + ... + 57305727510.

It is an arithmetic number, because the mean of its divisors is an integer number (171917182515).

Almost surely, 2^687668730054 is an apocalyptic number.

687668730054 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687668730054 is a wasteful number, since it uses less digits than its factorization.

687668730054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114611455014.

The product of its (nonzero) digits is 40642560, while the sum is 60.

The spelling of 687668730054 in words is "six hundred eighty-seven billion, six hundred sixty-eight million, seven hundred thirty thousand, fifty-four".