623707857011 has 2 divisors, whose sum is σ = 623707857012. Its totient is φ = 623707857010.

The previous prime is 623707856977. The next prime is 623707857079. The reversal of 623707857011 is 110758707326.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623707857011 is a prime.

It is a super-2 number, since 2×623707857011² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (623707857911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311853928505 + 311853928506.

It is an arithmetic number, because the mean of its divisors is an integer number (311853928506).

Almost surely, 2^623707857011 is an apocalyptic number.

623707857011 is a deficient number, since it is larger than the sum of its proper divisors (1).

623707857011 is an equidigital number, since it uses as much as digits as its factorization.

623707857011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 47.

The spelling of 623707857011 in words is "six hundred twenty-three billion, seven hundred seven million, eight hundred fifty-seven thousand, eleven".