1816402311536 has 20 divisors (see below), whose sum is σ = 3519305037264. Its totient is φ = 908194560000.

The previous prime is 1816402311527. The next prime is 1816402311541. The reversal of 1816402311536 is 6351132046181.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1816402311493 and 1816402311502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2470661 + ... + 3120411.

Almost surely, 2^{1816402311536} is an apocalyptic number.

1816402311536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1816402311536 is a deficient number, since it is larger than the sum of its proper divisors (1702902725728).

1816402311536 is a wasteful number, since it uses less digits than its factorization.

1816402311536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824480 (or 824474 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 1816402311536 in words is "one trillion, eight hundred sixteen billion, four hundred two million, three hundred eleven thousand, five hundred thirty-six".