618451558461 has 48 divisors (see below), whose sum is σ = 1021944605760. Its totient is φ = 356936751360.

The previous prime is 618451558451. The next prime is 618451558477. The reversal of 618451558461 is 164855154816.

It is a happy number.

618451558461 is a `hidden beast` number, since 6 + 1 + 8 + 4 + 51 + 5 + 584 + 6 + 1 = 666.

It is not a de Polignac number, because 618451558461 - 2⁹ = 618451557949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 618451558398 and 618451558407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618451558441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1265851 + ... + 1685016.

It is an arithmetic number, because the mean of its divisors is an integer number (21290512620).

Almost surely, 2^618451558461 is an apocalyptic number.

It is an amenable number.

618451558461 is a deficient number, since it is larger than the sum of its proper divisors (403493047299).

618451558461 is a wasteful number, since it uses less digits than its factorization.

618451558461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950986 (or 2950983 counting only the distinct ones).

The product of its digits is 4608000, while the sum is 54.

The spelling of 618451558461 in words is "six hundred eighteen billion, four hundred fifty-one million, five hundred fifty-eight thousand, four hundred sixty-one".