71102800649 has 2 divisors, whose sum is σ = 71102800650. Its totient is φ = 71102800648.

The previous prime is 71102800631. The next prime is 71102800751. The reversal of 71102800649 is 94600820117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55994703424 + 15108097225 = 236632^2 + 122915^2 .

It is a cyclic number.

It is not a de Polignac number, because 71102800649 - 2⁸ = 71102800393 is a prime.

It is not a weakly prime, because it can be changed into another prime (71102800049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35551400324 + 35551400325.

It is an arithmetic number, because the mean of its divisors is an integer number (35551400325).

Almost surely, 2^71102800649 is an apocalyptic number.

It is an amenable number.

71102800649 is a deficient number, since it is larger than the sum of its proper divisors (1).

71102800649 is an equidigital number, since it uses as much as digits as its factorization.

71102800649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 71102800649 in words is "seventy-one billion, one hundred two million, eight hundred thousand, six hundred forty-nine".