70138463977 has 2 divisors, whose sum is σ = 70138463978. Its totient is φ = 70138463976.

The previous prime is 70138463951. The next prime is 70138464029. The reversal of 70138463977 is 77936483107.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49525831936 + 20612632041 = 222544^2 + 143571^2 .

It is a cyclic number.

It is not a de Polignac number, because 70138463977 - 2¹¹ = 70138461929 is a prime.

It is not a weakly prime, because it can be changed into another prime (70138463917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35069231988 + 35069231989.

It is an arithmetic number, because the mean of its divisors is an integer number (35069231989).

Almost surely, 2^70138463977 is an apocalyptic number.

It is an amenable number.

70138463977 is a deficient number, since it is larger than the sum of its proper divisors (1).

70138463977 is an equidigital number, since it uses as much as digits as its factorization.

70138463977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5334336, while the sum is 55.

The spelling of 70138463977 in words is "seventy billion, one hundred thirty-eight million, four hundred sixty-three thousand, nine hundred seventy-seven".