618649454 has 16 divisors (see below), whose sum is σ = 962113920. Its totient is φ = 298032480.

The previous prime is 618649441. The next prime is 618649457. The reversal of 618649454 is 454946816.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 618649399 and 618649408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618649457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7589 + ... + 35984.

It is an arithmetic number, because the mean of its divisors is an integer number (60132120).

Almost surely, 2^618649454 is an apocalyptic number.

618649454 is a deficient number, since it is larger than the sum of its proper divisors (343464466).

618649454 is a wasteful number, since it uses less digits than its factorization.

618649454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43835.

The product of its digits is 829440, while the sum is 47.

The square root of 618649454 is about 24872.6647949109. The cubic root of 618649454 is about 852.0823013724.

The spelling of 618649454 in words is "six hundred eighteen million, six hundred forty-nine thousand, four hundred fifty-four".