74537321040 has 800 divisors, whose sum is σ = 326497602816. Its totient is φ = 15338004480.

The previous prime is 74537321029. The next prime is 74537321051. The reversal of 74537321040 is 4012373547.

74537321040 is a `hidden beast` number, since 74 + 5 + 373 + 210 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (74537321029) and next prime (74537321051).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 74537320986 and 74537321004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 24175339 + ... + 24178421.

Almost surely, 2^74537321040 is an apocalyptic number.

74537321040 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 74537321040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163248801408).

74537321040 is an abundant number, since it is smaller than the sum of its proper divisors (251960281776).

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

74537321040 is a wasteful number, since it uses less digits than its factorization.

74537321040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169 (or 3154 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

Adding to 74537321040 its reverse (4012373547), we get a palindrome (78549694587).

The spelling of 74537321040 in words is "seventy-four billion, five hundred thirty-seven million, three hundred twenty-one thousand, forty".