74820081540 has 48 divisors (see below), whose sum is σ = 209532839040. Its totient is φ = 19948535040.

The previous prime is 74820081533. The next prime is 74820081547. The reversal of 74820081540 is 4518002847.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (74820081533) and next prime (74820081547).

It is not an unprimeable number, because it can be changed into a prime (74820081547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246841 + ... + 458879.

It is an arithmetic number, because the mean of its divisors is an integer number (4365267480).

Almost surely, 2^74820081540 is an apocalyptic number.

It is an amenable number.

74820081540 is an abundant number, since it is smaller than the sum of its proper divisors (134712757500).

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

74820081540 is a wasteful number, since it uses less digits than its factorization.

74820081540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217932 (or 217930 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The spelling of 74820081540 in words is "seventy-four billion, eight hundred twenty million, eighty-one thousand, five hundred forty".