78244098137 has 2 divisors, whose sum is σ = 78244098138. Its totient is φ = 78244098136.

The previous prime is 78244098133. The next prime is 78244098181. The reversal of 78244098137 is 73189044287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56275226176 + 21968871961 = 237224^2 + 148219^2 .

It is a cyclic number.

It is not a de Polignac number, because 78244098137 - 2² = 78244098133 is a prime.

It is a super-2 number, since 2×78244098137² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78244098131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39122049068 + 39122049069.

It is an arithmetic number, because the mean of its divisors is an integer number (39122049069).

Almost surely, 2^78244098137 is an apocalyptic number.

It is an amenable number.

78244098137 is a deficient number, since it is larger than the sum of its proper divisors (1).

78244098137 is an equidigital number, since it uses as much as digits as its factorization.

78244098137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 78244098137 in words is "seventy-eight billion, two hundred forty-four million, ninety-eight thousand, one hundred thirty-seven".