74372561536 has 384 divisors, whose sum is σ = 201087532800. Its totient is φ = 26627014656.

The previous prime is 74372561509. The next prime is 74372561563. The reversal of 74372561536 is 63516527347.

It is an interprime number because it is at equal distance from previous prime (74372561509) and next prime (74372561563).

It is a super-2 number, since 2×74372561536² (a number of 23 digits) contains 22 as substring.

Its product of digits (3175200) is a multiple of the sum of its prime factors (864).

It is a self number, because there is not a number n which added to its sum of digits gives 74372561536.

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, 96712960 + ... + 96713728.

It is an arithmetic number, because the mean of its divisors is an integer number (523665450).

Almost surely, 2^74372561536 is an apocalyptic number.

74372561536 is a gapful number since it is divisible by the number (76) 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 74372561536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100543766400).

74372561536 is an abundant number, since it is smaller than the sum of its proper divisors (126714971264).

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

74372561536 is a wasteful number, since it uses less digits than its factorization.

74372561536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 833 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 49.

The spelling of 74372561536 in words is "seventy-four billion, three hundred seventy-two million, five hundred sixty-one thousand, five hundred thirty-six".