245375777025625 has 45 divisors (see below), whose sum is σ = 307474930794603. Its totient is φ = 195755811180000.

The previous prime is 245375777025559. The next prime is 245375777025641. The reversal of 245375777025625 is 526520777573542.

The square root of 245375777025625 is 15664475.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 109304578543689 + 136071198481936 = 10454883^2 + 11664956^2 .

It is not a de Polignac number, because 245375777025625 - 2¹³ = 245375777017433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 199330443760 + ... + 199330444990.

Almost surely, 2^{245375777025625} is an apocalyptic number.

245375777025625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

245375777025625 is the 15664475-th square number.

245375777025625 is the 7832238-th centered octagonal number.

It is an amenable number.

245375777025625 is a deficient number, since it is larger than the sum of its proper divisors (62099153768978).

245375777025625 is an frugal number, since it uses more digits than its factorization.

245375777025625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500 (or 1745 counting only the distinct ones).

The product of its (nonzero) digits is 864360000, while the sum is 67.

The spelling of 245375777025625 in words is "two hundred forty-five trillion, three hundred seventy-five billion, seven hundred seventy-seven million, twenty-five thousand, six hundred twenty-five".