61798463999 has 4 divisors (see below), whose sum is σ = 62435561664. Its totient is φ = 61161366336.

The previous prime is 61798463989. The next prime is 61798464029. The reversal of 61798463999 is 99936489716.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61798463999 - 2⁸ = 61798463743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61798463989) 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, 318548687 + ... + 318548880.

It is an arithmetic number, because the mean of its divisors is an integer number (15608890416).

Almost surely, 2^61798463999 is an apocalyptic number.

61798463999 is a deficient number, since it is larger than the sum of its proper divisors (637097665).

61798463999 is an equidigital number, since it uses as much as digits as its factorization.

61798463999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637097664.

The product of its digits is 158723712, while the sum is 71.

The spelling of 61798463999 in words is "sixty-one billion, seven hundred ninety-eight million, four hundred sixty-three thousand, nine hundred ninety-nine".