1659920542 has 16 divisors (see below), whose sum is σ = 2859069312. Its totient is φ = 708021720.

The previous prime is 1659920527. The next prime is 1659920543. The reversal of 1659920542 is 2450299561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1659920543) 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, 278008 + ... + 283915.

It is an arithmetic number, because the mean of its divisors is an integer number (178691832).

Almost surely, 2^1659920542 is an apocalyptic number.

1659920542 is a deficient number, since it is larger than the sum of its proper divisors (1199148770).

1659920542 is a wasteful number, since it uses less digits than its factorization.

1659920542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562143.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 1659920542 is about 40742.1224533038. The cubic root of 1659920542 is about 1184.0292552540.

The spelling of 1659920542 in words is "one billion, six hundred fifty-nine million, nine hundred twenty thousand, five hundred forty-two".