161271760650 has 192 divisors, whose sum is σ = 537001629696. Its totient is φ = 30933216000.

The previous prime is 161271760627. The next prime is 161271760697. The reversal of 161271760650 is 56067172161.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 386886 + ... + 687185.

It is an arithmetic number, because the mean of its divisors is an integer number (2796883488).

Almost surely, 2^161271760650 is an apocalyptic number.

161271760650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161271760650 is an abundant number, since it is smaller than the sum of its proper divisors (375729869046).

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

161271760650 is a wasteful number, since it uses less digits than its factorization.

161271760650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074117 (or 1074112 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 161271760650 in words is "one hundred sixty-one billion, two hundred seventy-one million, seven hundred sixty thousand, six hundred fifty".