407481478821 has 20 divisors (see below), whose sum is σ = 608726652864. Its totient is φ = 271645504200.

The previous prime is 407481478777. The next prime is 407481478841. The reversal of 407481478821 is 128874184704.

407481478821 is a `hidden beast` number, since 4 + 0 + 74 + 81 + 478 + 8 + 21 = 666.

It is not a de Polignac number, because 407481478821 - 2⁹ = 407481478309 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (407481478841) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3278706 + ... + 3400716.

Almost surely, 2^407481478821 is an apocalyptic number.

It is an amenable number.

407481478821 is a deficient number, since it is larger than the sum of its proper divisors (201245174043).

407481478821 is a wasteful number, since it uses less digits than its factorization.

407481478821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163254 (or 163245 counting only the distinct ones).

The product of its (nonzero) digits is 3211264, while the sum is 54.

The spelling of 407481478821 in words is "four hundred seven billion, four hundred eighty-one million, four hundred seventy-eight thousand, eight hundred twenty-one".