1659873894 has 64 divisors (see below), whose sum is σ = 3856000512. Its totient is φ = 466560000.

The previous prime is 1659873893. The next prime is 1659873907. The reversal of 1659873894 is 4983789561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1659873893) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 736269 + ... + 738519.

It is an arithmetic number, because the mean of its divisors is an integer number (60250008).

Almost surely, 2^1659873894 is an apocalyptic number.

1659873894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1659873894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928000256).

1659873894 is an abundant number, since it is smaller than the sum of its proper divisors (2196126618).

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

1659873894 is a wasteful number, since it uses less digits than its factorization.

1659873894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541.

The product of its digits is 13063680, while the sum is 60.

The square root of 1659873894 is about 40741.5499705154. The cubic root of 1659873894 is about 1184.0181637363.

The spelling of 1659873894 in words is "one billion, six hundred fifty-nine million, eight hundred seventy-three thousand, eight hundred ninety-four".