245864823013 has 4 divisors (see below), whose sum is σ = 253795946368. Its totient is φ = 237933699660.

The previous prime is 245864823007. The next prime is 245864823019. The reversal of 245864823013 is 310328468542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310328468542 = 2 ⋅155164234271.

It is an interprime number because it is at equal distance from previous prime (245864823007) and next prime (245864823019).

It is a cyclic number.

It is not a de Polignac number, because 245864823013 - 2⁹ = 245864822501 is a prime.

It is a super-2 number, since 2×245864823013² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245864823019) 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, 3965561631 + ... + 3965561692.

It is an arithmetic number, because the mean of its divisors is an integer number (63448986592).

Almost surely, 2^245864823013 is an apocalyptic number.

It is an amenable number.

245864823013 is a deficient number, since it is larger than the sum of its proper divisors (7931123355).

245864823013 is an equidigital number, since it uses as much as digits as its factorization.

245864823013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7931123354.

The product of its (nonzero) digits is 1105920, while the sum is 46.

The spelling of 245864823013 in words is "two hundred forty-five billion, eight hundred sixty-four million, eight hundred twenty-three thousand, thirteen".