245371005721 has 8 divisors (see below), whose sum is σ = 258298539200. Its totient is φ = 232444799280.

The previous prime is 245371005689. The next prime is 245371005751. The reversal of 245371005721 is 127500173542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245371005721 - 2⁵ = 245371005689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245371005751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59635 + ... + 703063.

It is an arithmetic number, because the mean of its divisors is an integer number (32287317400).

Almost surely, 2^245371005721 is an apocalyptic number.

It is an amenable number.

245371005721 is a deficient number, since it is larger than the sum of its proper divisors (12927533479).

245371005721 is a wasteful number, since it uses less digits than its factorization.

245371005721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663519.

The product of its (nonzero) digits is 58800, while the sum is 37.

The spelling of 245371005721 in words is "two hundred forty-five billion, three hundred seventy-one million, five thousand, seven hundred twenty-one".