161426215080 has 192 divisors, whose sum is σ = 565774569360. Its totient is φ = 39680630784.

The previous prime is 161426215043. The next prime is 161426215099. The reversal of 161426215080 is 80512624161.

It is a happy number.

161426215080 is a `hidden beast` number, since 1 + 6 + 1 + 426 + 2 + 150 + 80 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 44531972676 + 116894242404 = 211026^2 + 341898^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3406912 + ... + 3453968.

Almost surely, 2^161426215080 is an apocalyptic number.

161426215080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161426215080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282887284680).

161426215080 is an abundant number, since it is smaller than the sum of its proper divisors (404348354280).

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

161426215080 is a wasteful number, since it uses less digits than its factorization.

161426215080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47820 (or 47813 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 161426215080 in words is "one hundred sixty-one billion, four hundred twenty-six million, two hundred fifteen thousand, eighty".