1815990635164 has 12 divisors (see below), whose sum is σ = 3182403621600. Its totient is φ = 906732457568.

The previous prime is 1815990635161. The next prime is 1815990635167. The reversal of 1815990635164 is 4615360995181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1815990635161) and next prime (1815990635167).

It is a junction number, because it is equal to n+sod(n) for n = 1815990635099 and 1815990635108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1815990635161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315711769 + ... + 315717520.

It is an arithmetic number, because the mean of its divisors is an integer number (265200301800).

Almost surely, 2^{1815990635164} is an apocalyptic number.

It is an amenable number.

1815990635164 is a deficient number, since it is larger than the sum of its proper divisors (1366412986436).

1815990635164 is a wasteful number, since it uses less digits than its factorization.

1815990635164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631430012 (or 631430010 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 58.

The spelling of 1815990635164 in words is "one trillion, eight hundred fifteen billion, nine hundred ninety million, six hundred thirty-five thousand, one hundred sixty-four".