11782885401 has 45 divisors (see below), whose sum is σ = 20487214341. Its totient is φ = 6729169608.

The previous prime is 11782885393. The next prime is 11782885417. The reversal of 11782885401 is 10458828711.

The square root of 11782885401 is 108549.

It is a perfect power (a square), and thus also a powerful number.

11782885401 is a `hidden beast` number, since 11 + 78 + 28 + 8 + 540 + 1 = 666.

It is not a de Polignac number, because 11782885401 - 2³ = 11782885393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11782885601) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 6837726 + ... + 6839448.

Almost surely, 2^11782885401 is an apocalyptic number.

11782885401 is the 108549-th square number.

11782885401 is the 54275-th centered octagonal number.

It is an amenable number.

11782885401 is a deficient number, since it is larger than the sum of its proper divisors (8704328940).

11782885401 is an frugal number, since it uses more digits than its factorization.

11782885401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472 (or 1733 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 45.

The spelling of 11782885401 in words is "eleven billion, seven hundred eighty-two million, eight hundred eighty-five thousand, four hundred one".