61603007449 has 4 divisors (see below), whose sum is σ = 61603517440. Its totient is φ = 61602497460.

The previous prime is 61603007437. The next prime is 61603007519. The reversal of 61603007449 is 94470030616.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61603007449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61603007429) 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, 39784 + ... + 353254.

It is an arithmetic number, because the mean of its divisors is an integer number (15400879360).

Almost surely, 2^61603007449 is an apocalyptic number.

It is an amenable number.

61603007449 is a deficient number, since it is larger than the sum of its proper divisors (509991).

61603007449 is a wasteful number, since it uses less digits than its factorization.

61603007449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509990.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 61603007449 in words is "sixty-one billion, six hundred three million, seven thousand, four hundred forty-nine".