161839707442 has 32 divisors (see below), whose sum is σ = 279383466240. Its totient is φ = 68874235200.

The previous prime is 161839707433. The next prime is 161839707467. The reversal of 161839707442 is 244707938161.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 161839707442.

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, 6136468 + ... + 6162784.

It is an arithmetic number, because the mean of its divisors is an integer number (8730733320).

Almost surely, 2^161839707442 is an apocalyptic number.

161839707442 is a deficient number, since it is larger than the sum of its proper divisors (117543758798).

161839707442 is a wasteful number, since it uses less digits than its factorization.

161839707442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29386.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 161839707442 in words is "one hundred sixty-one billion, eight hundred thirty-nine million, seven hundred seven thousand, four hundred forty-two".