18578477913480 has 48 divisors (see below), whose sum is σ = 60380053219980. Its totient is φ = 4954260776832.

The previous prime is 18578477913461. The next prime is 18578477913481. The reversal of 18578477913480 is 8431977487581.

18578477913480 is a `hidden beast` number, since 1 + 8 + 5 + 78 + 4 + 7 + 79 + 1 + 3 + 480 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17521105815684 + 1057372097796 = 4185822^2 + 1028286^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 18578477913399 and 18578477913408.

It is not an unprimeable number, because it can be changed into a prime (18578477913481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25803441187 + ... + 25803441906.

Almost surely, 2^{18578477913480} is an apocalyptic number.

18578477913480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18578477913480 is an abundant number, since it is smaller than the sum of its proper divisors (41801575306500).

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

18578477913480 is a wasteful number, since it uses less digits than its factorization.

18578477913480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51606883110 (or 51606883103 counting only the distinct ones).

The product of its (nonzero) digits is 379330560, while the sum is 72.

The spelling of 18578477913480 in words is "eighteen trillion, five hundred seventy-eight billion, four hundred seventy-seven million, nine hundred thirteen thousand, four hundred eighty".