1618712464 has 20 divisors (see below), whose sum is σ = 3136929804. Its totient is φ = 809182208.

The previous prime is 1618712441. The next prime is 1618712471. The reversal of 1618712464 is 4642178161.

It can be written as a sum of positive squares in 2 ways, for example, as 686020864 + 932691600 = 26192^2 + 30540^2 .

It is a super-2 number, since 2×1618712464² = 5240460082217902592, which contains 22 as substring.

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, 100284 + ... + 115300.

Almost surely, 2^1618712464 is an apocalyptic number.

It is an amenable number.

1618712464 is a deficient number, since it is larger than the sum of its proper divisors (1518217340).

1618712464 is a wasteful number, since it uses less digits than its factorization.

1618712464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21762 (or 21756 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 1618712464 is about 40233.2258711628. The cubic root of 1618712464 is about 1174.1490658706.

The spelling of 1618712464 in words is "one billion, six hundred eighteen million, seven hundred twelve thousand, four hundred sixty-four".