1640116734 has 16 divisors (see below), whose sum is σ = 3280897920. Its totient is φ = 546594840.

The previous prime is 1640116711. The next prime is 1640116741. The reversal of 1640116734 is 4376110461.

It is a super-2 number, since 2×1640116734² = 5379965802293653512, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1640116695 and 1640116704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7929 + ... + 57819.

It is an arithmetic number, because the mean of its divisors is an integer number (205056120).

Almost surely, 2^1640116734 is an apocalyptic number.

1640116734 is an abundant number, since it is smaller than the sum of its proper divisors (1640781186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1640116734 is a wasteful number, since it uses less digits than its factorization.

1640116734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55375.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 1640116734 is about 40498.3547073211. The cubic root of 1640116734 is about 1179.3016872768.

The spelling of 1640116734 in words is "one billion, six hundred forty million, one hundred sixteen thousand, seven hundred thirty-four".