6785400149 has 4 divisors (see below), whose sum is σ = 7402254720. Its totient is φ = 6168545580.

The previous prime is 6785400133. The next prime is 6785400191. The reversal of 6785400149 is 9410045876.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6785400149 - 2⁴ = 6785400133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6785400649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308427269 + ... + 308427290.

It is an arithmetic number, because the mean of its divisors is an integer number (1850563680).

Almost surely, 2^6785400149 is an apocalyptic number.

It is an amenable number.

6785400149 is a deficient number, since it is larger than the sum of its proper divisors (616854571).

6785400149 is a wasteful number, since it uses less digits than its factorization.

6785400149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616854570.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 6785400149 is about 82373.5403451861. The cubic root of 6785400149 is about 1893.1796229242.

The spelling of 6785400149 in words is "six billion, seven hundred eighty-five million, four hundred thousand, one hundred forty-nine".