1640914271 has 16 divisors (see below), whose sum is σ = 1787385600. Its totient is φ = 1501270848.

The previous prime is 1640914267. The next prime is 1640914333. The reversal of 1640914271 is 1724190461.

It is a cyclic number.

It is not a de Polignac number, because 1640914271 - 2² = 1640914267 is a prime.

It is a super-2 number, since 2×1640914271² = 5385199289542922882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640914201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61430 + ... + 83996.

It is an arithmetic number, because the mean of its divisors is an integer number (111711600).

Almost surely, 2^1640914271 is an apocalyptic number.

1640914271 is a deficient number, since it is larger than the sum of its proper divisors (146471329).

1640914271 is a wasteful number, since it uses less digits than its factorization.

1640914271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22718.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1640914271 is about 40508.2000464104. The cubic root of 1640914271 is about 1179.4928086973.

The spelling of 1640914271 in words is "one billion, six hundred forty million, nine hundred fourteen thousand, two hundred seventy-one".