674991636480 has 1224 divisors, whose sum is σ = 2839117396752. Its totient is φ = 153391988736.

The previous prime is 674991636461. The next prime is 674991636491. The reversal of 674991636480 is 84636199476.

674991636480 is a `hidden beast` number, since 6 + 7 + 4 + 9 + 91 + 63 + 6 + 480 = 666.

It is a super-2 number, since 2×674991636480² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nialpdrome in base 12.

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 71 ways as a sum of consecutive naturals, for example, 3901685674 + ... + 3901685846.

Almost surely, 2^674991636480 is an apocalyptic number.

674991636480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 674991636480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1419558698376).

674991636480 is an abundant number, since it is smaller than the sum of its proper divisors (2164125760272).

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

674991636480 is an frugal number, since it uses more digits than its factorization.

674991636480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 674991636480 in words is "six hundred seventy-four billion, nine hundred ninety-one million, six hundred thirty-six thousand, four hundred eighty".