6911257394 has 4 divisors (see below), whose sum is σ = 10366886094. Its totient is φ = 3455628696.

The previous prime is 6911257357. The next prime is 6911257421. The reversal of 6911257394 is 4937521196.

6911257394 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6677014369 + 234243025 = 81713^2 + 15305^2 .

It is a super-2 number, since 2×6911257394² = 95530957532239342472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1727814347 + ... + 1727814350.

Almost surely, 2^6911257394 is an apocalyptic number.

6911257394 is a deficient number, since it is larger than the sum of its proper divisors (3455628700).

6911257394 is a wasteful number, since it uses less digits than its factorization.

6911257394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455628699.

The product of its digits is 408240, while the sum is 47.

The square root of 6911257394 is about 83133.9725623647. The cubic root of 6911257394 is about 1904.8130415421.

The spelling of 6911257394 in words is "six billion, nine hundred eleven million, two hundred fifty-seven thousand, three hundred ninety-four".