74138585472 has 128 divisors (see below), whose sum is σ = 250070707200. Its totient is φ = 21182446080.

The previous prime is 74138585441. The next prime is 74138585489. The reversal of 74138585472 is 27458583147.

74138585472 is a `hidden beast` number, since 7 + 4 + 13 + 8 + 585 + 47 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1508104 + ... + 1556487.

It is an arithmetic number, because the mean of its divisors is an integer number (1953677400).

Almost surely, 2^74138585472 is an apocalyptic number.

74138585472 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

74138585472 is an abundant number, since it is smaller than the sum of its proper divisors (175932121728).

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

74138585472 is a wasteful number, since it uses less digits than its factorization.

74138585472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064621 (or 3064603 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 54.

The spelling of 74138585472 in words is "seventy-four billion, one hundred thirty-eight million, five hundred eighty-five thousand, four hundred seventy-two".