161610251356422 has 24 divisors (see below), whose sum is σ = 381987866842920. Its totient is φ = 48972803441280.

The previous prime is 161610251356399. The next prime is 161610251356511. The reversal of 161610251356422 is 224653152016161.

161610251356422 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 1 + 0 + 251 + 356 + 42 + 2 = 666.

161610251356422 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161610251356422² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 408106695147 + ... + 408106695542.

It is an arithmetic number, because the mean of its divisors is an integer number (15916161118455).

Almost surely, 2^{161610251356422} is an apocalyptic number.

161610251356422 is an abundant number, since it is smaller than the sum of its proper divisors (220377615486498).

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

161610251356422 is a wasteful number, since it uses less digits than its factorization.

161610251356422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816213390708 (or 816213390705 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 161610251356422 in words is "one hundred sixty-one trillion, six hundred ten billion, two hundred fifty-one million, three hundred fifty-six thousand, four hundred twenty-two".