161420156103245 has 32 divisors (see below), whose sum is σ = 209106654529920. Its totient is φ = 118915654798080.

The previous prime is 161420156103221. The next prime is 161420156103251. The reversal of 161420156103245 is 542301651024161.

It is not a de Polignac number, because 161420156103245 - 2¹⁶ = 161420156037709 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1093951562 + ... + 1094099108.

It is an arithmetic number, because the mean of its divisors is an integer number (6534582954060).

Almost surely, 2^{161420156103245} is an apocalyptic number.

It is an amenable number.

161420156103245 is a deficient number, since it is larger than the sum of its proper divisors (47686498426675).

161420156103245 is a wasteful number, since it uses less digits than its factorization.

161420156103245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187965.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 161420156103245 in words is "one hundred sixty-one trillion, four hundred twenty billion, one hundred fifty-six million, one hundred three thousand, two hundred forty-five".