6419556091 has 6 divisors (see below), whose sum is σ = 6951353820. Its totient is φ = 5925743928.

The previous prime is 6419556089. The next prime is 6419556107. The reversal of 6419556091 is 1906559146.

It is a happy number.

It is not a de Polignac number, because 6419556091 - 2¹ = 6419556089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6419556791) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18992601 + ... + 18992938.

It is an arithmetic number, because the mean of its divisors is an integer number (1158558970).

Almost surely, 2^6419556091 is an apocalyptic number.

6419556091 is a deficient number, since it is larger than the sum of its proper divisors (531797729).

6419556091 is a wasteful number, since it uses less digits than its factorization.

6419556091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37985565 (or 37985552 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 6419556091 is about 80122.1323418193. The cubic root of 6419556091 is about 1858.5246800166.

The spelling of 6419556091 in words is "six billion, four hundred nineteen million, five hundred fifty-six thousand, ninety-one".