161265750366 has 128 divisors (see below), whose sum is σ = 385117323264. Its totient is φ = 44068147200.

The previous prime is 161265750337. The next prime is 161265750383. The reversal of 161265750366 is 663057562161.

It is a super-2 number, since 2×161265750366² (a number of 23 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 63 ways as a sum of consecutive naturals, for example, 16791966 + ... + 16801566.

It is an arithmetic number, because the mean of its divisors is an integer number (3008729088).

Almost surely, 2^161265750366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161265750366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192558661632).

161265750366 is an abundant number, since it is smaller than the sum of its proper divisors (223851572898).

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

161265750366 is a wasteful number, since it uses less digits than its factorization.

161265750366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9854.

The product of its (nonzero) digits is 1360800, while the sum is 48.

The spelling of 161265750366 in words is "one hundred sixty-one billion, two hundred sixty-five million, seven hundred fifty thousand, three hundred sixty-six".