245551222125220 has 96 divisors (see below), whose sum is σ = 569349382008960. Its totient is φ = 88209926492160.

The previous prime is 245551222125179. The next prime is 245551222125229. The reversal of 245551222125220 is 22521222155542.

It is not an unprimeable number, because it can be changed into a prime (245551222125229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 291246036 + ... + 292087924.

It is an arithmetic number, because the mean of its divisors is an integer number (5930722729260).

Almost surely, 2^{245551222125220} is an apocalyptic number.

245551222125220 is a gapful number since it is divisible by the number (20) 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 245551222125220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284674691004480).

245551222125220 is an abundant number, since it is smaller than the sum of its proper divisors (323798159883740).

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

245551222125220 is a wasteful number, since it uses less digits than its factorization.

245551222125220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857965 (or 857963 counting only the distinct ones).

The product of its (nonzero) digits is 320000, while the sum is 40.

The spelling of 245551222125220 in words is "two hundred forty-five trillion, five hundred fifty-one billion, two hundred twenty-two million, one hundred twenty-five thousand, two hundred twenty".