1866048261 has 16 divisors (see below), whose sum is σ = 3102002688. Its totient is φ = 969375600.

The previous prime is 1866048257. The next prime is 1866048271. The reversal of 1866048261 is 1628406681.

1866048261 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1866048261 - 2² = 1866048257 is a prime.

It is a super-2 number, since 2×1866048261² = 6964272224762248242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866048241) 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, 4038835 + ... + 4039296.

It is an arithmetic number, because the mean of its divisors is an integer number (193875168).

Almost surely, 2^1866048261 is an apocalyptic number.

1866048261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1866048261 is a deficient number, since it is larger than the sum of its proper divisors (1235954427).

1866048261 is a wasteful number, since it uses less digits than its factorization.

1866048261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8078152.

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 1866048261 is about 43197.7807416075. The cubic root of 1866048261 is about 1231.1405159299.

The spelling of 1866048261 in words is "one billion, eight hundred sixty-six million, forty-eight thousand, two hundred sixty-one".