947809338855 has 16 divisors (see below), whose sum is σ = 1596310465920. Its totient is φ = 478893139488.

The previous prime is 947809338799. The next prime is 947809338863. The reversal of 947809338855 is 558833908749.

It is a happy number.

It is not a de Polignac number, because 947809338855 - 2⁷ = 947809338727 is a prime.

It is a super-2 number, since 2×947809338855² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 947809338855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1662823117 + ... + 1662823686.

It is an arithmetic number, because the mean of its divisors is an integer number (99769404120).

Almost surely, 2^947809338855 is an apocalyptic number.

947809338855 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

947809338855 is a deficient number, since it is larger than the sum of its proper divisors (648501127065).

947809338855 is a wasteful number, since it uses less digits than its factorization.

947809338855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325646830.

The product of its (nonzero) digits is 261273600, while the sum is 69.

The spelling of 947809338855 in words is "nine hundred forty-seven billion, eight hundred nine million, three hundred thirty-eight thousand, eight hundred fifty-five".