161257346602842 has 32 divisors (see below), whose sum is σ = 368726944516992. Its totient is φ = 46056187137024.

The previous prime is 161257346602837. The next prime is 161257346602873. The reversal of 161257346602842 is 248206643752161.

It is a happy 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, 722406403 + ... + 722629590.

It is an arithmetic number, because the mean of its divisors is an integer number (11522717016156).

Almost surely, 2^{161257346602842} is an apocalyptic number.

161257346602842 is an abundant number, since it is smaller than the sum of its proper divisors (207469597914150).

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

161257346602842 is a wasteful number, since it uses less digits than its factorization.

161257346602842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445038662.

The product of its (nonzero) digits is 23224320, while the sum is 57.

The spelling of 161257346602842 in words is "one hundred sixty-one trillion, two hundred fifty-seven billion, three hundred forty-six million, six hundred two thousand, eight hundred forty-two".