523437812818 has 16 divisors (see below), whose sum is σ = 809993237760. Its totient is φ = 253503506736.

The previous prime is 523437812783. The next prime is 523437812851. The reversal of 523437812818 is 818218734325.

It is a happy number.

It is a super-2 number, since 2×523437812818² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15843328 + ... + 15876331.

It is an arithmetic number, because the mean of its divisors is an integer number (50624577360).

Almost surely, 2^523437812818 is an apocalyptic number.

523437812818 is a deficient number, since it is larger than the sum of its proper divisors (286555424942).

523437812818 is a wasteful number, since it uses less digits than its factorization.

523437812818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31719921.

The product of its digits is 2580480, while the sum is 52.

The spelling of 523437812818 in words is "five hundred twenty-three billion, four hundred thirty-seven million, eight hundred twelve thousand, eight hundred eighteen".