974393780640 has 576 divisors, whose sum is σ = 3771466997760. Its totient is φ = 210514913280.

The previous prime is 974393780561. The next prime is 974393780663. The reversal of 974393780640 is 46087393479.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 31336621 + ... + 31367699.

It is an arithmetic number, because the mean of its divisors is an integer number (6547685760).

Almost surely, 2^974393780640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 974393780640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1885733498880).

974393780640 is an abundant number, since it is smaller than the sum of its proper divisors (2797073217120).

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

974393780640 is a wasteful number, since it uses less digits than its factorization.

974393780640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31185 (or 31170 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 60.

The spelling of 974393780640 in words is "nine hundred seventy-four billion, three hundred ninety-three million, seven hundred eighty thousand, six hundred forty".