61364219999 has 2 divisors, whose sum is σ = 61364220000. Its totient is φ = 61364219998.

The previous prime is 61364219993. The next prime is 61364220007. The reversal of 61364219999 is 99991246316.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61364219999 is a prime.

It is a super-3 number, since 3×61364219999³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61364219993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30682109999 + 30682110000.

It is an arithmetic number, because the mean of its divisors is an integer number (30682110000).

Almost surely, 2^61364219999 is an apocalyptic number.

61364219999 is a deficient number, since it is larger than the sum of its proper divisors (1).

61364219999 is an equidigital number, since it uses as much as digits as its factorization.

61364219999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5668704, while the sum is 59.

The spelling of 61364219999 in words is "sixty-one billion, three hundred sixty-four million, two hundred nineteen thousand, nine hundred ninety-nine".