161277480 has 320 divisors, whose sum is σ = 668384640. Its totient is φ = 33965568.

The previous prime is 161277443. The next prime is 161277499. The reversal of 161277480 is 84772161.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 294567 + ... + 295113.

It is an arithmetic number, because the mean of its divisors is an integer number (2088702).

Almost surely, 2^161277480 is an apocalyptic number.

161277480 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 161277480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334192320).

161277480 is an abundant number, since it is smaller than the sum of its proper divisors (507107160).

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

161277480 is a wasteful number, since it uses less digits than its factorization.

161277480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 161277480 is about 12699.5070770483. The cubic root of 161277480 is about 544.3245342231.

The spelling of 161277480 in words is "one hundred sixty-one million, two hundred seventy-seven thousand, four hundred eighty".