2147811856 has 40 divisors (see below), whose sum is σ = 4279708224. Its totient is φ = 1043752320.

The previous prime is 2147811847. The next prime is 2147811877. The reversal of 2147811856 is 6581187412.

It is a super-2 number, since 2×2147811856² = 9226191537548329472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78901 + ... + 102571.

Almost surely, 2^2147811856 is an apocalyptic number.

It is an amenable number.

2147811856 is a deficient number, since it is larger than the sum of its proper divisors (2131896368).

2147811856 is a wasteful number, since it uses less digits than its factorization.

2147811856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23839 (or 23833 counting only the distinct ones).

The product of its digits is 107520, while the sum is 43.

The square root of 2147811856 is about 46344.4911073582. The cubic root of 2147811856 is about 1290.2248783690.

The spelling of 2147811856 in words is "two billion, one hundred forty-seven million, eight hundred eleven thousand, eight hundred fifty-six".