618721010 has 32 divisors (see below), whose sum is σ = 1134907200. Its totient is φ = 242817088.

The previous prime is 618721009. The next prime is 618721027. The reversal of 618721010 is 10127816.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121169 + ... + 126171.

It is an arithmetic number, because the mean of its divisors is an integer number (35465850).

Almost surely, 2^618721010 is an apocalyptic number.

618721010 is a deficient number, since it is larger than the sum of its proper divisors (516186190).

618721010 is a wasteful number, since it uses less digits than its factorization.

618721010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5242.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 618721010 is about 24874.1031999146. The cubic root of 618721010 is about 852.1151520981.

Adding to 618721010 its reverse (10127816), we get a palindrome (628848826).

The spelling of 618721010 in words is "six hundred eighteen million, seven hundred twenty-one thousand, ten".