61999008011 has 2 divisors, whose sum is σ = 61999008012. Its totient is φ = 61999008010.

The previous prime is 61999007981. The next prime is 61999008017. The reversal of 61999008011 is 11080099916.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61999008011 is a prime.

It is a super-2 number, since 2×61999008011² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61999008017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30999504005 + 30999504006.

It is an arithmetic number, because the mean of its divisors is an integer number (30999504006).

Almost surely, 2^61999008011 is an apocalyptic number.

61999008011 is a deficient number, since it is larger than the sum of its proper divisors (1).

61999008011 is an equidigital number, since it uses as much as digits as its factorization.

61999008011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 44.

The spelling of 61999008011 in words is "sixty-one billion, nine hundred ninety-nine million, eight thousand, eleven".