78174420158480 has 80 divisors (see below), whose sum is σ = 192513193925040. Its totient is φ = 29420251447296.

The previous prime is 78174420158441. The next prime is 78174420158507. The reversal of 78174420158480 is 8485102447187.

It can be written as a sum of positive squares in 8 ways, for example, as 13546198026256 + 64628222132224 = 3680516^2 + 8039168^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×78174420158480² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5923649 + ... + 13836128.

It is an arithmetic number, because the mean of its divisors is an integer number (2406414924063).

Almost surely, 2^{78174420158480} is an apocalyptic number.

It is an amenable number.

78174420158480 is an abundant number, since it is smaller than the sum of its proper divisors (114338773766560).

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

78174420158480 is a wasteful number, since it uses less digits than its factorization.

78174420158480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19762716 (or 19762710 counting only the distinct ones).

The product of its (nonzero) digits is 16056320, while the sum is 59.

The spelling of 78174420158480 in words is "seventy-eight trillion, one hundred seventy-four billion, four hundred twenty million, one hundred fifty-eight thousand, four hundred eighty".