2820155518461 has 8 divisors (see below), whose sum is σ = 3760224698880. Its totient is φ = 1880095008512.

The previous prime is 2820155518399. The next prime is 2820155518489. The reversal of 2820155518461 is 1648155510282.

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

It is a cyclic number.

It is not a de Polignac number, because 2820155518461 - 2¹¹ = 2820155516413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2820155518461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820155518361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1366365 + ... + 2739938.

It is an arithmetic number, because the mean of its divisors is an integer number (470028087360).

Almost surely, 2^{2820155518461} is an apocalyptic number.

It is an amenable number.

2820155518461 is a deficient number, since it is larger than the sum of its proper divisors (940069180419).

2820155518461 is a wasteful number, since it uses less digits than its factorization.

2820155518461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4335235.

The product of its (nonzero) digits is 768000, while the sum is 48.

The spelling of 2820155518461 in words is "two trillion, eight hundred twenty billion, one hundred fifty-five million, five hundred eighteen thousand, four hundred sixty-one".