1664015143 has 8 divisors (see below), whose sum is σ = 1928517120. Its totient is φ = 1406209560.

The previous prime is 1664015123. The next prime is 1664015159. The reversal of 1664015143 is 3415104661.

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

It is not a de Polignac number, because 1664015143 - 2²¹ = 1661917991 is a prime.

It is a super-2 number, since 2×1664015143² = 5537892792266620898, 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 (1664015113) 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, 1673563 + ... + 1674556.

It is an arithmetic number, because the mean of its divisors is an integer number (241064640).

Almost surely, 2^1664015143 is an apocalyptic number.

1664015143 is a deficient number, since it is larger than the sum of its proper divisors (264501977).

1664015143 is an equidigital number, since it uses as much as digits as its factorization.

1664015143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348197.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1664015143 is about 40792.3417199846. The cubic root of 1664015143 is about 1185.0020219897.

The spelling of 1664015143 in words is "one billion, six hundred sixty-four million, fifteen thousand, one hundred forty-three".