82649978951 has 2 divisors, whose sum is σ = 82649978952. Its totient is φ = 82649978950.

The previous prime is 82649978947. The next prime is 82649979037. The reversal of 82649978951 is 15987994628.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82649978951 - 2² = 82649978947 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82649978911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41324989475 + 41324989476.

It is an arithmetic number, because the mean of its divisors is an integer number (41324989476).

Almost surely, 2^82649978951 is an apocalyptic number.

82649978951 is a deficient number, since it is larger than the sum of its proper divisors (1).

82649978951 is an equidigital number, since it uses as much as digits as its factorization.

82649978951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78382080, while the sum is 68.

The spelling of 82649978951 in words is "eighty-two billion, six hundred forty-nine million, nine hundred seventy-eight thousand, nine hundred fifty-one".