627551641680 has 80 divisors (see below), whose sum is σ = 1946243557440. Its totient is φ = 167275408384.

The previous prime is 627551641669. The next prime is 627551641709. The reversal of 627551641680 is 86146155726.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×627551641680² (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 in 15 ways as a sum of consecutive naturals, for example, 2404 + ... + 1120316.

It is an arithmetic number, because the mean of its divisors is an integer number (24328044468).

Almost surely, 2^627551641680 is an apocalyptic number.

627551641680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

627551641680 is an abundant number, since it is smaller than the sum of its proper divisors (1318691915760).

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

627551641680 is a wasteful number, since it uses less digits than its factorization.

627551641680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120268 (or 1120262 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 627551641680 in words is "six hundred twenty-seven billion, five hundred fifty-one million, six hundred forty-one thousand, six hundred eighty".