74451501664 has 48 divisors (see below), whose sum is σ = 151407083520. Its totient is φ = 36000535680.

The previous prime is 74451501617. The next prime is 74451501701. The reversal of 74451501664 is 46610515447.

It is a super-2 number, since 2×74451501664² (a number of 23 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 74451501664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1486177 + ... + 1535455.

It is an arithmetic number, because the mean of its divisors is an integer number (3154314240).

Almost surely, 2^74451501664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74451501664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75703541760).

74451501664 is an abundant number, since it is smaller than the sum of its proper divisors (76955581856).

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

74451501664 is a wasteful number, since it uses less digits than its factorization.

74451501664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50843 (or 50835 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 74451501664 in words is "seventy-four billion, four hundred fifty-one million, five hundred one thousand, six hundred sixty-four".