245315555519 has 4 divisors (see below), whose sum is σ = 246560812344. Its totient is φ = 244070298696.

The previous prime is 245315555479. The next prime is 245315555521. The reversal of 245315555519 is 915555513542.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 245315555519 - 2²⁸ = 245047120063 is a prime.

It is a super-2 number, since 2×245315555519² (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 (245315555539) 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, 622628117 + ... + 622628510.

It is an arithmetic number, because the mean of its divisors is an integer number (61640203086).

Almost surely, 2^245315555519 is an apocalyptic number.

245315555519 is a deficient number, since it is larger than the sum of its proper divisors (1245256825).

245315555519 is a wasteful number, since it uses less digits than its factorization.

245315555519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245256824.

The product of its digits is 3375000, while the sum is 50.

The spelling of 245315555519 in words is "two hundred forty-five billion, three hundred fifteen million, five hundred fifty-five thousand, five hundred nineteen".