6155343891 has 12 divisors (see below), whose sum is σ = 8892934440. Its totient is φ = 4102693920.

The previous prime is 6155343889. The next prime is 6155343913. The reversal of 6155343891 is 1983435516.

6155343891 is a `hidden beast` number, since 6 + 1 + 553 + 4 + 3 + 8 + 91 = 666.

It is not a de Polignac number, because 6155343891 - 2¹ = 6155343889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6155341891) 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, 25945 + ... + 113946.

It is an arithmetic number, because the mean of its divisors is an integer number (741077870).

Almost surely, 2^6155343891 is an apocalyptic number.

6155343891 is a deficient number, since it is larger than the sum of its proper divisors (2737590549).

6155343891 is a wasteful number, since it uses less digits than its factorization.

6155343891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144786 (or 144783 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 6155343891 is about 78455.9997132150. Note that the first 3 decimals coincide. The cubic root of 6155343891 is about 1832.6693097785.

Adding to 6155343891 its sum of digits (45), we get a square (6155343936 = 78456²).

The spelling of 6155343891 in words is "six billion, one hundred fifty-five million, three hundred forty-three thousand, eight hundred ninety-one".