1640377475 has 12 divisors (see below), whose sum is σ = 2218983720. Its totient is φ = 1193001600.

The previous prime is 1640377469. The next prime is 1640377513. The reversal of 1640377475 is 5747730461.

It is not a de Polignac number, because 1640377475 - 2¹⁴ = 1640361091 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2982230 + ... + 2982779.

It is an arithmetic number, because the mean of its divisors is an integer number (184915310).

Almost surely, 2^1640377475 is an apocalyptic number.

1640377475 is a deficient number, since it is larger than the sum of its proper divisors (578606245).

1640377475 is a wasteful number, since it uses less digits than its factorization.

1640377475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5965030 (or 5965025 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 44.

The square root of 1640377475 is about 40501.5737348563. The cubic root of 1640377475 is about 1179.3641779523.

The spelling of 1640377475 in words is "one billion, six hundred forty million, three hundred seventy-seven thousand, four hundred seventy-five".