6781396475 has 144 divisors (see below), whose sum is σ = 11059292160. Its totient is φ = 4022092800.

The previous prime is 6781396471. The next prime is 6781396487. The reversal of 6781396475 is 5746931876.

It is not a de Polignac number, because 6781396475 - 2² = 6781396471 is a prime.

It is a super-2 number, since 2×6781396475² = 91974676302284851250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6781396475.

It is not an unprimeable number, because it can be changed into a prime (6781396471) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 48786956 + ... + 48787094.

It is an arithmetic number, because the mean of its divisors is an integer number (76800640).

Almost surely, 2^6781396475 is an apocalyptic number.

6781396475 is a deficient number, since it is larger than the sum of its proper divisors (4277895685).

6781396475 is a wasteful number, since it uses less digits than its factorization.

6781396475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 222 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 56.

The square root of 6781396475 is about 82349.2348173315. The cubic root of 6781396475 is about 1892.8071975633.

The spelling of 6781396475 in words is "six billion, seven hundred eighty-one million, three hundred ninety-six thousand, four hundred seventy-five".