674739065520 has 800 divisors, whose sum is σ = 2629312963200. Its totient is φ = 159272386560.

The previous prime is 674739065519. The next prime is 674739065527. The reversal of 674739065520 is 25560937476.

674739065520 is a `hidden beast` number, since 6 + 7 + 473 + 90 + 65 + 5 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (674739065527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 221296956 + ... + 221300004.

It is an arithmetic number, because the mean of its divisors is an integer number (3286641204).

Almost surely, 2^674739065520 is an apocalyptic number.

674739065520 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 674739065520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1314656481600).

674739065520 is an abundant number, since it is smaller than the sum of its proper divisors (1954573897680).

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

674739065520 is a wasteful number, since it uses less digits than its factorization.

674739065520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3195 (or 3180 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 54.

The spelling of 674739065520 in words is "six hundred seventy-four billion, seven hundred thirty-nine million, sixty-five thousand, five hundred twenty".