245464021776128 has 72 divisors (see below), whose sum is σ = 491482058538240. Its totient is φ = 122353492229120.

The previous prime is 245464021776121. The next prime is 245464021776167. The reversal of 245464021776128 is 821677120464542.

It is a super-2 number, since 2×245464021776128² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245464021776121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143358083 + ... + 145060221.

It is an arithmetic number, because the mean of its divisors is an integer number (6826139701920).

Almost surely, 2^{245464021776128} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245464021776128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245741029269120).

245464021776128 is an abundant number, since it is smaller than the sum of its proper divisors (246018036762112).

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

245464021776128 is a wasteful number, since it uses less digits than its factorization.

245464021776128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703893 (or 1703879 counting only the distinct ones).

The product of its (nonzero) digits is 36126720, while the sum is 59.

The spelling of 245464021776128 in words is "two hundred forty-five trillion, four hundred sixty-four billion, twenty-one million, seven hundred seventy-six thousand, one hundred twenty-eight".