61603553443 has 2 divisors, whose sum is σ = 61603553444. Its totient is φ = 61603553442.

The previous prime is 61603553437. The next prime is 61603553467. The reversal of 61603553443 is 34435530616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61603553443 - 2⁹ = 61603552931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61603553396 and 61603553405.

It is not a weakly prime, because it can be changed into another prime (61603553743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30801776721 + 30801776722.

It is an arithmetic number, because the mean of its divisors is an integer number (30801776722).

Almost surely, 2^61603553443 is an apocalyptic number.

61603553443 is a deficient number, since it is larger than the sum of its proper divisors (1).

61603553443 is an equidigital number, since it uses as much as digits as its factorization.

61603553443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 40.

The spelling of 61603553443 in words is "sixty-one billion, six hundred three million, five hundred fifty-three thousand, four hundred forty-three".