78915582373 has 2 divisors, whose sum is σ = 78915582374. Its totient is φ = 78915582372.

The previous prime is 78915582359. The next prime is 78915582397. The reversal of 78915582373 is 37328551987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57224773089 + 21690809284 = 239217^2 + 147278^2 .

It is an emirp because it is prime and its reverse (37328551987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78915582373 - 2²¹ = 78913485221 is a prime.

It is a super-2 number, since 2×78915582373² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78915582073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39457791186 + 39457791187.

It is an arithmetic number, because the mean of its divisors is an integer number (39457791187).

Almost surely, 2^78915582373 is an apocalyptic number.

It is an amenable number.

78915582373 is a deficient number, since it is larger than the sum of its proper divisors (1).

78915582373 is an equidigital number, since it uses as much as digits as its factorization.

78915582373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12700800, while the sum is 58.

The spelling of 78915582373 in words is "seventy-eight billion, nine hundred fifteen million, five hundred eighty-two thousand, three hundred seventy-three".