1318923656 has 16 divisors (see below), whose sum is σ = 2519642700. Its totient is φ = 647018944.

The previous prime is 1318923611. The next prime is 1318923659. The reversal of 1318923656 is 6563298131.

It can be written as a sum of positive squares in 2 ways, for example, as 1039030756 + 279892900 = 32234^2 + 16730^2 .

It is a super-2 number, since 2×1318923656² = 3479119220712812672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1318923659) 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, 1554911 + ... + 1555758.

Almost surely, 2^1318923656 is an apocalyptic number.

It is an amenable number.

1318923656 is a deficient number, since it is larger than the sum of its proper divisors (1200719044).

1318923656 is a wasteful number, since it uses less digits than its factorization.

1318923656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3110728 (or 3110724 counting only the distinct ones).

The product of its digits is 233280, while the sum is 44.

The square root of 1318923656 is about 36316.9885315399. The cubic root of 1318923656 is about 1096.6630708927.

The spelling of 1318923656 in words is "one billion, three hundred eighteen million, nine hundred twenty-three thousand, six hundred fifty-six".