2872521861 has 8 divisors (see below), whose sum is σ = 4178213664. Its totient is φ = 1740922320.

The previous prime is 2872521857. The next prime is 2872521901. The reversal of 2872521861 is 1681252782.

2872521861 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2872521861 - 2² = 2872521857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2872521361) 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, 43523026 + ... + 43523091.

It is an arithmetic number, because the mean of its divisors is an integer number (522276708).

Almost surely, 2^2872521861 is an apocalyptic number.

It is an amenable number.

2872521861 is a deficient number, since it is larger than the sum of its proper divisors (1305691803).

2872521861 is a wasteful number, since it uses less digits than its factorization.

2872521861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87046131.

The product of its digits is 107520, while the sum is 42.

The square root of 2872521861 is about 53595.9127266250. The cubic root of 2872521861 is about 1421.5248218948.

The spelling of 2872521861 in words is "two billion, eight hundred seventy-two million, five hundred twenty-one thousand, eight hundred sixty-one".