1640216331274 has 8 divisors (see below), whose sum is σ = 2462215603428. Its totient is φ = 819477796800.

The previous prime is 1640216331233. The next prime is 1640216331287. The reversal of 1640216331274 is 4721336120461.

It can be written as a sum of positive squares in 2 ways, for example, as 1059180597225 + 581035734049 = 1029165^2 + 762257^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1640216331274² (a number of 25 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 315181167 + ... + 315186370.

Almost surely, 2^{1640216331274} is an apocalyptic number.

1640216331274 is a deficient number, since it is larger than the sum of its proper divisors (821999272154).

1640216331274 is a wasteful number, since it uses less digits than its factorization.

1640216331274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630368840.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 1640216331274 in words is "one trillion, six hundred forty billion, two hundred sixteen million, three hundred thirty-one thousand, two hundred seventy-four".