7072621018 has 4 divisors (see below), whose sum is σ = 10608931530. Its totient is φ = 3536310508.

The previous prime is 7072621013. The next prime is 7072621033. The reversal of 7072621018 is 8101262707.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6178431609 + 894189409 = 78603^2 + 29903^2 .

It is not an unprimeable number, because it can be changed into a prime (7072621013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1768155253 + ... + 1768155256.

Almost surely, 2^7072621018 is an apocalyptic number.

7072621018 is a deficient number, since it is larger than the sum of its proper divisors (3536310512).

7072621018 is a wasteful number, since it uses less digits than its factorization.

7072621018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536310511.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 7072621018 is about 84098.8764372034. The cubic root of 7072621018 is about 1919.5236283811.

The spelling of 7072621018 in words is "seven billion, seventy-two million, six hundred twenty-one thousand, eighteen".