72618811 has 8 divisors (see below), whose sum is σ = 73592064. Its totient is φ = 71650920.

The previous prime is 72618761. The next prime is 72618839. The reversal of 72618811 is 11881627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72618811 - 2¹¹ = 72616763 is a prime.

It is a super-2 number, since 2×72618811² = 10546983422107442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72618841) 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, 30900 + ... + 33166.

It is an arithmetic number, because the mean of its divisors is an integer number (9199008).

Almost surely, 2^72618811 is an apocalyptic number.

72618811 is a deficient number, since it is larger than the sum of its proper divisors (973253).

72618811 is a wasteful number, since it uses less digits than its factorization.

72618811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2681.

The product of its digits is 5376, while the sum is 34.

The square root of 72618811 is about 8521.6671490971. The cubic root of 72618811 is about 417.2051985581.

The spelling of 72618811 in words is "seventy-two million, six hundred eighteen thousand, eight hundred eleven".