2101477861 has 8 divisors (see below), whose sum is σ = 2401971264. Its totient is φ = 1801055040.

The previous prime is 2101477853. The next prime is 2101477867. The reversal of 2101477861 is 1687741012.

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 2101477861 - 2³ = 2101477853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2101477861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101477867) 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, 89766 + ... + 110728.

It is an arithmetic number, because the mean of its divisors is an integer number (300246408).

Almost surely, 2^2101477861 is an apocalyptic number.

It is an amenable number.

2101477861 is a deficient number, since it is larger than the sum of its proper divisors (300493403).

2101477861 is a wasteful number, since it uses less digits than its factorization.

2101477861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35291.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 2101477861 is about 45841.8788991027. The cubic root of 2101477861 is about 1280.8794942303.

The spelling of 2101477861 in words is "two billion, one hundred one million, four hundred seventy-seven thousand, eight hundred sixty-one".