74564505578 has 8 divisors (see below), whose sum is σ = 117733429920. Its totient is φ = 35320028940.

The previous prime is 74564505577. The next prime is 74564505599. The reversal of 74564505578 is 87550546547.

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

It is a super-2 number, since 2×74564505578² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74564505577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 981111878 + ... + 981111953.

It is an arithmetic number, because the mean of its divisors is an integer number (14716678740).

Almost surely, 2^74564505578 is an apocalyptic number.

74564505578 is a deficient number, since it is larger than the sum of its proper divisors (43168924342).

74564505578 is a wasteful number, since it uses less digits than its factorization.

74564505578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962223852.

The product of its (nonzero) digits is 23520000, while the sum is 56.

The spelling of 74564505578 in words is "seventy-four billion, five hundred sixty-four million, five hundred five thousand, five hundred seventy-eight".