245103477721 has 4 divisors (see below), whose sum is σ = 245123794944. Its totient is φ = 245083160500.

The previous prime is 245103477719. The next prime is 245103477737. The reversal of 245103477721 is 127774301542.

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.

It is a cyclic number.

It is not a de Polignac number, because 245103477721 - 2¹ = 245103477719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245103477701) 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, 10140505 + ... + 10164646.

It is an arithmetic number, because the mean of its divisors is an integer number (61280948736).

Almost surely, 2^245103477721 is an apocalyptic number.

It is an amenable number.

245103477721 is a deficient number, since it is larger than the sum of its proper divisors (20317223).

245103477721 is a wasteful number, since it uses less digits than its factorization.

245103477721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20317222.

The product of its (nonzero) digits is 329280, while the sum is 43.

The spelling of 245103477721 in words is "two hundred forty-five billion, one hundred three million, four hundred seventy-seven thousand, seven hundred twenty-one".