2861205514956 has 144 divisors (see below), whose sum is σ = 7596913877280. Its totient is φ = 941534876160.

The previous prime is 2861205514943. The next prime is 2861205514961. The reversal of 2861205514956 is 6594155021682.

2861205514956 is a `hidden beast` number, since 2 + 8 + 61 + 20 + 551 + 4 + 9 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24043330 + ... + 24162038.

It is an arithmetic number, because the mean of its divisors is an integer number (52756346370).

Almost surely, 2^{2861205514956} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2861205514956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3798456938640).

2861205514956 is an abundant number, since it is smaller than the sum of its proper divisors (4735708362324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2861205514956 is a wasteful number, since it uses less digits than its factorization.

2861205514956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119046 (or 119032 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 54.

The spelling of 2861205514956 in words is "two trillion, eight hundred sixty-one billion, two hundred five million, five hundred fourteen thousand, nine hundred fifty-six".