164425717578 has 16 divisors (see below), whose sum is σ = 348195637440. Its totient is φ = 51584538816.

The previous prime is 164425717559. The next prime is 164425717583. The reversal of 164425717578 is 875717524461.

It is a super-3 number, since 3×164425717578³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 806008318 + ... + 806008521.

It is an arithmetic number, because the mean of its divisors is an integer number (21762227340).

Almost surely, 2^164425717578 is an apocalyptic number.

164425717578 is an abundant number, since it is smaller than the sum of its proper divisors (183769919862).

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

164425717578 is a wasteful number, since it uses less digits than its factorization.

164425717578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612016861.

The product of its digits is 13171200, while the sum is 57.

The spelling of 164425717578 in words is "one hundred sixty-four billion, four hundred twenty-five million, seven hundred seventeen thousand, five hundred seventy-eight".