4890636861 has 16 divisors (see below), whose sum is σ = 7145564160. Its totient is φ = 2950726320.

The previous prime is 4890636853. The next prime is 4890636913. The reversal of 4890636861 is 1686360984.

It is not a de Polignac number, because 4890636861 - 2³ = 4890636853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4890636811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324931 + ... + 339648.

It is an arithmetic number, because the mean of its divisors is an integer number (446597760).

Almost surely, 2^4890636861 is an apocalyptic number.

It is an amenable number.

4890636861 is a deficient number, since it is larger than the sum of its proper divisors (2254927299).

4890636861 is a wasteful number, since it uses less digits than its factorization.

4890636861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664816.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 4890636861 is about 69933.0884560377. The cubic root of 4890636861 is about 1697.4167063285.

The spelling of 4890636861 in words is "four billion, eight hundred ninety million, six hundred thirty-six thousand, eight hundred sixty-one".