61603753399 has 2 divisors, whose sum is σ = 61603753400. Its totient is φ = 61603753398.

The previous prime is 61603753363. The next prime is 61603753457. The reversal of 61603753399 is 99335730616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61603753399 - 2⁹ = 61603752887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61603753499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30801876699 + 30801876700.

It is an arithmetic number, because the mean of its divisors is an integer number (30801876700).

Almost surely, 2^61603753399 is an apocalyptic number.

61603753399 is a deficient number, since it is larger than the sum of its proper divisors (1).

61603753399 is an equidigital number, since it uses as much as digits as its factorization.

61603753399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2755620, while the sum is 52.

The spelling of 61603753399 in words is "sixty-one billion, six hundred three million, seven hundred fifty-three thousand, three hundred ninety-nine".