245213149979 has 4 divisors (see below), whose sum is σ = 280243599984. Its totient is φ = 210182699976.

The previous prime is 245213149933. The next prime is 245213149981. The reversal of 245213149979 is 979941312542.

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 245213149979 - 2³² = 240918182683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245213119979) 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, 17515224992 + ... + 17515225005.

It is an arithmetic number, because the mean of its divisors is an integer number (70060899996).

Almost surely, 2^245213149979 is an apocalyptic number.

245213149979 is a deficient number, since it is larger than the sum of its proper divisors (35030450005).

245213149979 is an equidigital number, since it uses as much as digits as its factorization.

245213149979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35030450004.

The product of its digits is 4898880, while the sum is 56.

The spelling of 245213149979 in words is "two hundred forty-five billion, two hundred thirteen million, one hundred forty-nine thousand, nine hundred seventy-nine".