315772825578 has 128 divisors (see below), whose sum is σ = 766613790720. Its totient is φ = 84759333120.

The previous prime is 315772825541. The next prime is 315772825591. The reversal of 315772825578 is 875528277513.

It is a happy number.

It is a super-2 number, since 2×315772825578² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44603443 + ... + 44610521.

It is an arithmetic number, because the mean of its divisors is an integer number (5989170240).

Almost surely, 2^315772825578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 315772825578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383306895360).

315772825578 is an abundant number, since it is smaller than the sum of its proper divisors (450840965142).

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

315772825578 is a wasteful number, since it uses less digits than its factorization.

315772825578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7932.

The product of its digits is 32928000, while the sum is 60.

The spelling of 315772825578 in words is "three hundred fifteen billion, seven hundred seventy-two million, eight hundred twenty-five thousand, five hundred seventy-eight".