1316401605 has 64 divisors (see below), whose sum is σ = 2477260800. Its totient is φ = 661400640.

The previous prime is 1316401589. The next prime is 1316401631. The reversal of 1316401605 is 5061046131.

1316401605 is a `hidden beast` number, since 1 + 3 + 1 + 640 + 16 + 0 + 5 = 666.

It is not a de Polignac number, because 1316401605 - 2⁴ = 1316401589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 488572 + ... + 491258.

It is an arithmetic number, because the mean of its divisors is an integer number (38707200).

Almost surely, 2^1316401605 is an apocalyptic number.

1316401605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1316401605 is a deficient number, since it is larger than the sum of its proper divisors (1160859195).

1316401605 is a wasteful number, since it uses less digits than its factorization.

1316401605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911 (or 2905 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1316401605 is about 36282.2491722881. The cubic root of 1316401605 is about 1095.9636103876.

Adding to 1316401605 its reverse (5061046131), we get a palindrome (6377447736).

The spelling of 1316401605 in words is "one billion, three hundred sixteen million, four hundred one thousand, six hundred five".