100078006261 has 2 divisors, whose sum is σ = 100078006262. Its totient is φ = 100078006260.

The previous prime is 100078006241. The next prime is 100078006313. The reversal of 100078006261 is 162600870001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71679352900 + 28398653361 = 267730^2 + 168519^2 .

It is a cyclic number.

It is not a de Polignac number, because 100078006261 - 2¹⁷ = 100077875189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100078006241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50039003130 + 50039003131.

It is an arithmetic number, because the mean of its divisors is an integer number (50039003131).

Almost surely, 2^100078006261 is an apocalyptic number.

It is an amenable number.

100078006261 is a deficient number, since it is larger than the sum of its proper divisors (1).

100078006261 is an equidigital number, since it uses as much as digits as its factorization.

100078006261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 100078006261 its reverse (162600870001), we get a palindrome (262678876262).

The spelling of 100078006261 in words is "one hundred billion, seventy-eight million, six thousand, two hundred sixty-one".