245364706640 has 160 divisors (see below), whose sum is σ = 595655938080. Its totient is φ = 93914726400.

The previous prime is 245364706633. The next prime is 245364706649. The reversal of 245364706640 is 46607463542.

It can be written as a sum of positive squares in 16 ways, for example, as 104895663376 + 140469043264 = 323876^2 + 374792^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245364706649) 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, 79430216 + ... + 79433304.

It is an arithmetic number, because the mean of its divisors is an integer number (3722849613).

Almost surely, 2^245364706640 is an apocalyptic number.

245364706640 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 245364706640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297827969040).

245364706640 is an abundant number, since it is smaller than the sum of its proper divisors (350291231440).

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

245364706640 is a wasteful number, since it uses less digits than its factorization.

245364706640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601 (or 3595 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 47.

The spelling of 245364706640 in words is "two hundred forty-five billion, three hundred sixty-four million, seven hundred six thousand, six hundred forty".