74647012440 has 1024 divisors, whose sum is σ = 321889075200. Its totient is φ = 13341081600.

The previous prime is 74647012421. The next prime is 74647012469. The reversal of 74647012440 is 4421074647.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 113272831 + ... + 113273489.

It is an arithmetic number, because the mean of its divisors is an integer number (314344800).

Almost surely, 2^74647012440 is an apocalyptic number.

74647012440 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 74647012440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160944537600).

74647012440 is an abundant number, since it is smaller than the sum of its proper divisors (247242062760).

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

74647012440 is a wasteful number, since it uses less digits than its factorization.

74647012440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 39.

The spelling of 74647012440 in words is "seventy-four billion, six hundred forty-seven million, twelve thousand, four hundred forty".