2081356678 has 8 divisors (see below), whose sum is σ = 3222745920. Its totient is φ = 1007108040.

The previous prime is 2081356663. The next prime is 2081356703. The reversal of 2081356678 is 8766531802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16785073 + ... + 16785196.

It is an arithmetic number, because the mean of its divisors is an integer number (402843240).

Almost surely, 2^2081356678 is an apocalyptic number.

2081356678 is a deficient number, since it is larger than the sum of its proper divisors (1141389242).

2081356678 is a wasteful number, since it uses less digits than its factorization.

2081356678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33570302.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 2081356678 is about 45621.8881459328. Note that the first 3 decimals coincide. The cubic root of 2081356678 is about 1276.7783316066.

The spelling of 2081356678 in words is "two billion, eighty-one million, three hundred fifty-six thousand, six hundred seventy-eight".