1640146543 has 8 divisors (see below), whose sum is σ = 1934919680. Its totient is φ = 1360490040.

The previous prime is 1640146517. The next prime is 1640146567. The reversal of 1640146543 is 3456410461.

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

It is not a de Polignac number, because 1640146543 - 2¹⁷ = 1640015471 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1640146499 and 1640146508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640146643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3778923 + ... + 3779356.

It is an arithmetic number, because the mean of its divisors is an integer number (241864960).

Almost surely, 2^1640146543 is an apocalyptic number.

1640146543 is a deficient number, since it is larger than the sum of its proper divisors (294773137).

1640146543 is an equidigital number, since it uses as much as digits as its factorization.

1640146543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7558317.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 1640146543 is about 40498.7227329455. The cubic root of 1640146543 is about 1179.3088318071.

The spelling of 1640146543 in words is "one billion, six hundred forty million, one hundred forty-six thousand, five hundred forty-three".