245705407019 has 4 divisors (see below), whose sum is σ = 251419486296. Its totient is φ = 239991327744.

The previous prime is 245705406997. The next prime is 245705407037. The reversal of 245705407019 is 910704507542.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245705407019 is a prime.

It is a super-2 number, since 2×245705407019² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245705407039) 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, 2857039574 + ... + 2857039659.

It is an arithmetic number, because the mean of its divisors is an integer number (62854871574).

Almost surely, 2^245705407019 is an apocalyptic number.

245705407019 is a deficient number, since it is larger than the sum of its proper divisors (5714079277).

245705407019 is an equidigital number, since it uses as much as digits as its factorization.

245705407019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5714079276.

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 245705407019 in words is "two hundred forty-five billion, seven hundred five million, four hundred seven thousand, nineteen".