27823543461 has 24 divisors (see below), whose sum is σ = 45974248320. Its totient is φ = 15884172576.

The previous prime is 27823543441. The next prime is 27823543469. The reversal of 27823543461 is 16434532872.

27823543461 is a `hidden beast` number, since 2 + 78 + 235 + 4 + 346 + 1 = 666.

It is not a de Polignac number, because 27823543461 - 2²¹ = 27821446309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27823543469) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140766 + ... + 274703.

It is an arithmetic number, because the mean of its divisors is an integer number (1915593680).

Almost surely, 2^27823543461 is an apocalyptic number.

27823543461 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

27823543461 is a deficient number, since it is larger than the sum of its proper divisors (18150704859).

27823543461 is a wasteful number, since it uses less digits than its factorization.

27823543461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416545 (or 416542 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The spelling of 27823543461 in words is "twenty-seven billion, eight hundred twenty-three million, five hundred forty-three thousand, four hundred sixty-one".