213654973545 has 96 divisors (see below), whose sum is σ = 408814293888. Its totient is φ = 102557435904.

The previous prime is 213654973541. The next prime is 213654973577. The reversal of 213654973545 is 545379456312.

213654973545 is a `hidden beast` number, since 2 + 1 + 3 + 6 + 5 + 4 + 97 + 3 + 545 = 666.

It is not a de Polignac number, because 213654973545 - 2² = 213654973541 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213654973491 and 213654973500.

It is not an unprimeable number, because it can be changed into a prime (213654973541) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14909754 + ... + 14924076.

It is an arithmetic number, because the mean of its divisors is an integer number (4258482228).

Almost surely, 2^213654973545 is an apocalyptic number.

It is an amenable number.

213654973545 is a deficient number, since it is larger than the sum of its proper divisors (195159320343).

213654973545 is a wasteful number, since it uses less digits than its factorization.

213654973545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14983 (or 14980 counting only the distinct ones).

The product of its digits is 13608000, while the sum is 54.

The spelling of 213654973545 in words is "two hundred thirteen billion, six hundred fifty-four million, nine hundred seventy-three thousand, five hundred forty-five".