78344370990543 has 32 divisors (see below), whose sum is σ = 119682193462272. Its totient is φ = 44655695136000.

The previous prime is 78344370990493. The next prime is 78344370990607. The reversal of 78344370990543 is 34509907344387.

It is not a de Polignac number, because 78344370990543 - 2⁸ = 78344370990287 is a prime.

It is a super-2 number, since 2×78344370990543² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78344370990143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18129483 + ... + 22031043.

It is an arithmetic number, because the mean of its divisors is an integer number (3740068545696).

Almost surely, 2^{78344370990543} is an apocalyptic number.

78344370990543 is a deficient number, since it is larger than the sum of its proper divisors (41337822471729).

78344370990543 is a wasteful number, since it uses less digits than its factorization.

78344370990543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3903975.

The product of its (nonzero) digits is 274337280, while the sum is 66.

The spelling of 78344370990543 in words is "seventy-eight trillion, three hundred forty-four billion, three hundred seventy million, nine hundred ninety thousand, five hundred forty-three".