78402523458 has 16 divisors (see below), whose sum is σ = 179205768000. Its totient is φ = 22400720976.

The previous prime is 78402523447. The next prime is 78402523471. The reversal of 78402523458 is 85432520487.

It is a super-3 number, since 3×78402523458³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 933363333 + ... + 933363416.

It is an arithmetic number, because the mean of its divisors is an integer number (11200360500).

Almost surely, 2^78402523458 is an apocalyptic number.

78402523458 is an abundant number, since it is smaller than the sum of its proper divisors (100803244542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78402523458 is a wasteful number, since it uses less digits than its factorization.

78402523458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866726761.

The product of its (nonzero) digits is 2150400, while the sum is 48.

The spelling of 78402523458 in words is "seventy-eight billion, four hundred two million, five hundred twenty-three thousand, four hundred fifty-eight".