74809889280 has 400 divisors, whose sum is σ = 306229239360. Its totient is φ = 17099071488.

The previous prime is 74809889269. The next prime is 74809889311. The reversal of 74809889280 is 8298890847.

It is a happy number.

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

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 39 ways as a sum of consecutive naturals, for example, 1425751 + ... + 1477289.

Almost surely, 2^74809889280 is an apocalyptic number.

74809889280 is a gapful number since it is divisible by the number (70) 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 74809889280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153114619680).

74809889280 is an abundant number, since it is smaller than the sum of its proper divisors (231419350080).

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

74809889280 is an equidigital number, since it uses as much as digits as its factorization.

74809889280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51581 (or 51556 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 63.

The spelling of 74809889280 in words is "seventy-four billion, eight hundred nine million, eight hundred eighty-nine thousand, two hundred eighty".