245145520001 has 4 divisors (see below), whose sum is σ = 245163128532. Its totient is φ = 245127911472.

The previous prime is 245145519989. The next prime is 245145520021. The reversal of 245145520001 is 100025541542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100025541542 = 2 ⋅50012770771.

It can be written as a sum of positive squares in 2 ways, for example, as 135965500225 + 109180019776 = 368735^2 + 330424^2 .

It is a cyclic number.

It is not a de Polignac number, because 245145520001 - 2¹⁸ = 245145257857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (245145520021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8783366 + ... + 8811231.

It is an arithmetic number, because the mean of its divisors is an integer number (61290782133).

Almost surely, 2^245145520001 is an apocalyptic number.

It is an amenable number.

245145520001 is a deficient number, since it is larger than the sum of its proper divisors (17608531).

245145520001 is a wasteful number, since it uses less digits than its factorization.

245145520001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17608530.

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 245145520001 in words is "two hundred forty-five billion, one hundred forty-five million, five hundred twenty thousand, one".