78321245741 has 2 divisors, whose sum is σ = 78321245742. Its totient is φ = 78321245740.

The previous prime is 78321245693. The next prime is 78321245771. The reversal of 78321245741 is 14754212387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66010455625 + 12310790116 = 256925^2 + 110954^2 .

It is a cyclic number.

It is not a de Polignac number, because 78321245741 - 2⁶ = 78321245677 is a prime.

It is a super-2 number, since 2×78321245741² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78321245692 and 78321245701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78321245771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39160622870 + 39160622871.

It is an arithmetic number, because the mean of its divisors is an integer number (39160622871).

Almost surely, 2^78321245741 is an apocalyptic number.

It is an amenable number.

78321245741 is a deficient number, since it is larger than the sum of its proper divisors (1).

78321245741 is an equidigital number, since it uses as much as digits as its factorization.

78321245741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376320, while the sum is 44.

The spelling of 78321245741 in words is "seventy-eight billion, three hundred twenty-one million, two hundred forty-five thousand, seven hundred forty-one".