161762386500 has 1920 divisors, whose sum is σ = 690452066304. Its totient is φ = 32348160000.

The previous prime is 161762386397. The next prime is 161762386507. The reversal of 161762386500 is 5683267161.

161762386500 is a `hidden beast` number, since 1 + 6 + 1 + 7 + 62 + 3 + 86 + 500 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (161762386507) by changing a digit.

It is a polite number, since it can be written in 639 ways as a sum of consecutive naturals, for example, 3052120474 + ... + 3052120526.

Almost surely, 2^161762386500 is an apocalyptic number.

161762386500 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 161762386500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345226033152).

161762386500 is an abundant number, since it is smaller than the sum of its proper divisors (528689679804).

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

161762386500 is a wasteful number, since it uses less digits than its factorization.

161762386500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 161762386500 in words is "one hundred sixty-one billion, seven hundred sixty-two million, three hundred eighty-six thousand, five hundred".