1659920494 has 32 divisors (see below), whose sum is σ = 2672222400. Its totient is φ = 770585088.

The previous prime is 1659920489. The next prime is 1659920527. The reversal of 1659920494 is 4940299561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 794319 + ... + 796405.

It is an arithmetic number, because the mean of its divisors is an integer number (83506950).

Almost surely, 2^1659920494 is an apocalyptic number.

1659920494 is a deficient number, since it is larger than the sum of its proper divisors (1012301906).

1659920494 is a wasteful number, since it uses less digits than its factorization.

1659920494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 1659920494 is about 40742.1218642328. The cubic root of 1659920494 is about 1184.0292438411.

The spelling of 1659920494 in words is "one billion, six hundred fifty-nine million, nine hundred twenty thousand, four hundred ninety-four".