74555494272 has 384 divisors, whose sum is σ = 253016924160. Its totient is φ = 20630163456.

The previous prime is 74555494241. The next prime is 74555494291. The reversal of 74555494272 is 27249455547.

It is a happy number.

74555494272 is a `hidden beast` number, since 7 + 4 + 55 + 549 + 42 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×74555494272² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44036658 + ... + 44038350.

It is an arithmetic number, because the mean of its divisors is an integer number (658898240).

Almost surely, 2^74555494272 is an apocalyptic number.

74555494272 is a gapful number since it is divisible by the number (72) 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 74555494272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126508462080).

74555494272 is an abundant number, since it is smaller than the sum of its proper divisors (178461429888).

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

74555494272 is a wasteful number, since it uses less digits than its factorization.

74555494272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890 (or 1875 counting only the distinct ones).

The product of its digits is 14112000, while the sum is 54.

The spelling of 74555494272 in words is "seventy-four billion, five hundred fifty-five million, four hundred ninety-four thousand, two hundred seventy-two".