11854551897 has 6 divisors (see below), whose sum is σ = 17123241642. Its totient is φ = 7903034592.

The previous prime is 11854551889. The next prime is 11854551959. The reversal of 11854551897 is 79815545811.

11854551897 is a `hidden beast` number, since 1 + 1 + 8 + 5 + 4 + 551 + 89 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10916906256 + 937645641 = 104484^2 + 30621^2 .

It is not a de Polignac number, because 11854551897 - 2³ = 11854551889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11854551847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 658586208 + ... + 658586225.

It is an arithmetic number, because the mean of its divisors is an integer number (2853873607).

Almost surely, 2^11854551897 is an apocalyptic number.

It is an amenable number.

11854551897 is a deficient number, since it is larger than the sum of its proper divisors (5268689745).

11854551897 is a wasteful number, since it uses less digits than its factorization.

11854551897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317172439 (or 1317172436 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 54.

The spelling of 11854551897 in words is "eleven billion, eight hundred fifty-four million, five hundred fifty-one thousand, eight hundred ninety-seven".