80478399123 has 40 divisors (see below), whose sum is σ = 126586521600. Its totient is φ = 50813084592.

The previous prime is 80478399107. The next prime is 80478399137. The reversal of 80478399123 is 32199387408.

80478399123 is a `hidden beast` number, since 80 + 478 + 3 + 9 + 91 + 2 + 3 = 666.

It is not a de Polignac number, because 80478399123 - 2⁴ = 80478399107 is a prime.

It is a super-3 number, since 3×80478399123³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80478399123.

It is not an unprimeable number, because it can be changed into a prime (80478399163) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7232358 + ... + 7243476.

It is an arithmetic number, because the mean of its divisors is an integer number (3164663040).

Almost surely, 2^80478399123 is an apocalyptic number.

80478399123 is a deficient number, since it is larger than the sum of its proper divisors (46108122477).

80478399123 is a wasteful number, since it uses less digits than its factorization.

80478399123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15853 (or 15844 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 80478399123 in words is "eighty billion, four hundred seventy-eight million, three hundred ninety-nine thousand, one hundred twenty-three".