78044537651141 has 2 divisors, whose sum is σ = 78044537651142. Its totient is φ = 78044537651140.

The previous prime is 78044537651131. The next prime is 78044537651177. The reversal of 78044537651141 is 14115673544087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70445302648900 + 7599235002241 = 8393170^2 + 2756671^2 .

It is a cyclic number.

It is not a de Polignac number, because 78044537651141 - 2⁶ = 78044537651077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78044537651131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39022268825570 + 39022268825571.

It is an arithmetic number, because the mean of its divisors is an integer number (39022268825571).

Almost surely, 2^{78044537651141} is an apocalyptic number.

It is an amenable number.

78044537651141 is a deficient number, since it is larger than the sum of its proper divisors (1).

78044537651141 is an equidigital number, since it uses as much as digits as its factorization.

78044537651141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11289600, while the sum is 56.

The spelling of 78044537651141 in words is "seventy-eight trillion, forty-four billion, five hundred thirty-seven million, six hundred fifty-one thousand, one hundred forty-one".