74580577978 has 8 divisors (see below), whose sum is σ = 114472515168. Its totient is φ = 36423072924.

The previous prime is 74580577949. The next prime is 74580577999. The reversal of 74580577978 is 87977508547.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×74580577978² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433607926 + ... + 433608097.

It is an arithmetic number, because the mean of its divisors is an integer number (14309064396).

Almost surely, 2^74580577978 is an apocalyptic number.

74580577978 is a deficient number, since it is larger than the sum of its proper divisors (39891937190).

74580577978 is a wasteful number, since it uses less digits than its factorization.

74580577978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867216068.

The product of its (nonzero) digits is 138297600, while the sum is 67.

The spelling of 74580577978 in words is "seventy-four billion, five hundred eighty million, five hundred seventy-seven thousand, nine hundred seventy-eight".