6781413555 has 80 divisors (see below), whose sum is σ = 14176747200. Its totient is φ = 3100011264.

The previous prime is 6781413533. The next prime is 6781413559. The reversal of 6781413555 is 5553141876.

6781413555 is a `hidden beast` number, since 6 + 7 + 81 + 4 + 13 + 555 = 666.

It is not a de Polignac number, because 6781413555 - 2⁵ = 6781413523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6781413555.

It is not an unprimeable number, because it can be changed into a prime (6781413559) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 114507 + ... + 163323.

It is an arithmetic number, because the mean of its divisors is an integer number (177209340).

Almost surely, 2^6781413555 is an apocalyptic number.

6781413555 is an abundant number, since it is smaller than the sum of its proper divisors (7395333645).

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

6781413555 is an equidigital number, since it uses as much as digits as its factorization.

6781413555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48855 (or 48832 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 6781413555 is about 82349.3385219335. The cubic root of 6781413555 is about 1892.8087866716.

The spelling of 6781413555 in words is "six billion, seven hundred eighty-one million, four hundred thirteen thousand, five hundred fifty-five".