3818664436557 has 16 divisors (see below), whose sum is σ = 5220817328448. Its totient is φ = 2481882574080.

The previous prime is 3818664436523. The next prime is 3818664436589. The reversal of 3818664436557 is 7556344668183.

It is a happy number.

It is not a de Polignac number, because 3818664436557 - 2¹⁵ = 3818664403789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3818654436557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92311263 + ... + 92352620.

It is an arithmetic number, because the mean of its divisors is an integer number (326301083028).

Almost surely, 2^{3818664436557} is an apocalyptic number.

It is an amenable number.

3818664436557 is a deficient number, since it is larger than the sum of its proper divisors (1402152891891).

3818664436557 is a wasteful number, since it uses less digits than its factorization.

3818664436557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184664060.

The product of its digits is 348364800, while the sum is 66.

The spelling of 3818664436557 in words is "three trillion, eight hundred eighteen billion, six hundred sixty-four million, four hundred thirty-six thousand, five hundred fifty-seven".